Sunday Best Build Guide

One day, after dinner, while my younger sister and I...

Just kidding!

Sunday is an excellent Harmony support specializing in 100% Action Advance for both a character and their respective summoned entity if they have one. He provides a lot of the same value as Bronya does while also granting greater benefits when buffing characters with summons and being more SP-positive at the same time. Sunday also provides a percent Max Energy restore for a chosen ally and grants them further CRIT DMG buffs based on Sunday's CRIT DMG. He is extraordinarily potent for summoners and traditional DPS alike.

Back from the grave (allegedly), Sunday brings with him the light of redemption and really damn good teammate buffs. Another character to add to the growing pile of Action Advancers, Sunday apparently got the redemption arc powerup because his abilities are extremely good.

His Skill is like Bronya's, he selects a single ally character to immediately take action and increases their DMG dealt by up to 30%. With just this part alone it's quite a bit weaker than Bronya's 66% DMG buff, but there's more. If the targeted ally has a summon (such as Lightning-Lord or Numby), the DMG% boost is additionally increased by up to 50%. In either case, the DMG boost lasts for 2 turns.

This means summon characters that get Advanced by Sunday have a whopping 80% DMG boost for 2 turns, meaning you don't need to worry about the summon missing out on damage from an overly short duration buff. If Sunday uses this Skill on a Harmony character, they'll get the DMG bonuses but will not have their Action Advanced.

Sunday's Talent makes it so that whenever he uses his Skill on an ally, that ally will also gain up to 20% CRIT Rate for 3 turns. Yes, that's right, 3 whole turns. This means that even if he's using his Skill on a character without a summon, you still get 30% DMG and 20% CRIT Rate, which is absolutely fantastic. On a character with a summon, 80% DMG and 20% CRIT Rate is an almost unheard of single-target boost to be giving out in singular turns without the aid of an Ultimate.

Speaking of his Ultimate, Sunday's still got more to offer. For the cost of 130 Energy, he chooses a single ally to buff, regenerating 20% of their Max Energy and turning the targeted ally and their summon into 'The Beatified'. This will grant the ally CRIT DMG equal to up to 30% of Sunday's CRIT DMG stat plus up to an extra 12%. We've seen this CRIT DMG boosting effect more than once now, but his is especially generous when it comes to scaling off of his own stat.

'The Beatified' lasts for 3 turns and ticks down at the start of each of Sunday's turns. There's actually yet more interaction with his Skill, for if he uses his Skill on an ally designated as 'The Beatified', Sunday recovers 1 Skill Point. Ye,s you did read that correctly, not only does he get to place all these crazy buffs on an ally, but he also gets to do it for free*. While he doesn't directly restore any SP, he also doesn't incur an SP cost to use his Skill, making him completely SP neutral in ideal cases.

Already Sunday is able to turbo-buff a single ally to ridiculous levels, and since he's able to be minimally SP-negative while he does so, it even allows him to be used with characters previously thought too overly SP-negative themselves, letting him be very flexible in terms of teams and teammate options.

Sunday's A2 Bonus Ability Trace makes it so that his Ultimate's Energy restore cannot restore less than 40 Energy in any circumstance; for characters with very high Max Energy this won't matter, but if someone has a very cheap Ultimate, Sunday will still be able to grant them a massive influx of Energy. 40, to be precise.

His A4 simply grants Sunday an extra 25 Energy upon combat start, speeding up the process of acquiring his Ultimate and granting an ally 'The Beatified', and lastly his A6 will also allow his Skill to cleanse 1 debuff from an ally when he uses it.

Sunday's Eidolons are unnecessary but naturally very strong should you choose to go for them. E1 allows the ally buffed by his Skill to ignore 16% of enemies' DEF when dealing damage, and allows their summons to ignore 40% instead, with this effect lasting 2 turns. E2 Restores 2 SP when using the Ultimate for the first time in a fight and additionally increases the DMG% of 'The Beatified' by 30. E4 lets Sunday regen 8 Energy at the start of every turn. E6 lets his Talent's CRIT Rate become stackable up to 3 times, the duration goes to 4 turns, and excess CRIT Rate becomes CRIT DMG.

Sunday is just very good in a multitude of cases. Everywhere you might want to use Bronya or Sparkle, Sunday can effortlessly fit in, often overtaking them in performance; his Skill always lasting 2 turns means follow-up characters and counter characters have a much better time since they often attack outside of their turn, and his unique bonus benefits for summon-based characters means he automatically shoots up to be their best choice.

It's important to note that this means Sunday is quite Ultimate reliant to be at his best, and to maintain SP neutrality he needs to have 100% uptime on his Ultimate. This means he's gotta get it back within the 3 turns of the effects of 'The Beatified'. This is not hugely difficult to achieve, but it does come at the cost of mandating an Energy restoring Light Cone alongside an Energy Regeneration Rope.

Without this, getting Sunday's Ultimate back in time to use it again will be dependent on getting hit or other outside sources like Huohuo, so as much as it'd be good to have access to another Dance Dance Dance, unless you go for his signature Light Cone, your best bet is Bronya’s Signature Light Cone (or Meshing Cogs if you really really don’t have anything better). His own Signature Light Cone in particular is pretty damn strong so if you choose to go for it, you won't be disappointed, especially since it also gives SP restore and yet more DMG% for his buffed ally.

Because he fits into the same archetype as Bronya, he naturally has many of the same SPD considerations when it comes to building him. Thankfully the maximum extent of this is far below Bronya's due to Sunday not having a self-advancing Talent, so the choices much more neatly fall into one of two: -1 SPD and 'As fast as possible'.

-1 SPD is just setting Sunday to be 1 SPD slower than the intended recipient of his Skill so that he can quickly give them double actions, and going as fast as possible lets Sunday permanently drag a designated ally up to his SPD value and letting you completely forgo SPD on that character. Whichever one you choose largely depends on the character in question as well as your own personal preferences.

Ordinarily, I'd be keen to do comparisons between similar characters but Sunday is mostly just an upgrade in all aspects with fewer downsides to boot. An argument can be made for Bronya as a long-term investment since she's a standard 5-star and her Eidolons are very good and likely to crop up over time, and I would personally agree with that statement, but Sunday is still just better right out of the box.

Even for Sparkle, while she is marginally SP-positive compared to Sunday's SP neutrality, the lack of a full 100% Action Advance really kills the willingness to use her over Sunday, especially since he also directly supersedes the benefits for follow-up and summon characters.

There is definitely potential for Sunday to be used alongside either of these two in very specific or hyper-optimised setups, especially since the DPS that would benefit the most already allow for a good degree of flexibility themselves.

It'll be interesting to see how he shapes up over time. We do not have many characters within the summon archetype just yet and yet Sunday already seems to be vying for the top spots in terms of supports. You could even find a use for him in a Boothill team, I'm sure they'd be really chuffed to be placed shoulder to shoulder.

If this is how good Sunday is now, then there is a little bit of fear for what may await us in the coming 3.x patches.