AHA! Another fellow Arthur’s lover!
One thing who is good about Arthur is his mixed stats who love merges and DF. Sadly without merges he won’t shine like you want, but with merges he becomes really nice!
He like all boon outsides of HP who is only “okay” for panic build (but even for them it’s actually not really worth it). The more versatiles ones are ATK and SPD because they’ll be usefull for almost every builds.
One thing I actually don’t recommand is DC on his A slot : Without “stat-stick” A slot, it would be difficult for him to break the triangle, and he don’t really have the defensives stats for using DC at his fullest if he have spd/atk boon. Only if he have def/res boon you could put DC on him (res is a superboon).
Krazytre’s DC build is a solid one, albeit expensive. I would only change the special to one with a lesser CD and maybe the assist for not relying on other to proc atk/spd ruse.
You can build Arthur with multiples builds, and he’ll be great in almost all of them. I use spd boon for versatility, because he like spd in defensives and offensives builds.
I’ll put down multiples builds I use/imagined for giving you somes idea
Main build omega tank
If I had the fodders, I would switch brazen def/res by fortress def/res and wrath by special spiral.
The point of this build is to tank anything, survive and launch ignis bomb in their face.
I actually use it from times to times in AR and it’s still really good.
He always have def/res tactic buff, so that make him at 44/34 def/res stats for the first fight, and 51/48 when he is under 80%. If we take atk smoke into account he is at 58/55 with special deny. I actually soloed somes AR def with him and 1dancer that buffed him and refreshed him (because he needed to finish in 7tours!)
He sometimes have spd support that bring him to 42, which is often enough for double deny a lot of unit. And even 36 unbuffed is always nice to have for doubling/deny doubles of slow tank
Secondary build "Justice smash"
It’s a very old build, from long before special spiral (or ares) was released. Now you might want to switch wrath to special spiral and heavy blade to hardy bearing.
The principle of this build is to launch an aoe special every player phase with wrath, or every fight with special spiral. Quite a classical one, it’s easy to understand how it work with special spiral, but it’s a bit more tricky with wrath.
With wrath, you’ll want to drop under 75% in the first fight. I’ll resume how it work for making it more understandable : The first fight you’ll charge your 3cd aoe special (and maybe kill the ennemy), you’ll drop under 75% hp too. Then you dance him/wait for the next player phase. He’ll launch his CD so it’ll have 3cd again, Arthur’s will smack the remaining ennemy unit’s hp with usually one attack with heavy blade, so it’ll go down to 1. Next player phase, because Arthur’s is under 75% hp, wrath reduce his special cd by one, so it’ll go back to 0!
On a side note : wrath power-up the aoe damage by 10, so he’ll launch bigger special with wrath than special spiral
Quad build Idea
It’s an expensive build who need at least one B!Eliwood, a 5* F!Takumi and a brave axe.
You can swap atk/spd ruse for desperation.
This build can show Arthur’s can do everything : At 100% hp without buff, he’ll sit at 50/38 offensives stats, nothing too amazing but still solid for a brave weapon user. But when he’ll get under 80% => 57 atk and 45spd. For a brave weapon user, it’s starting to be really nice. And with atk/spd buff, he’ll sit at 63/51 offensives stats. It’s litteraly the atk/spd of a +10 +spd Raven with basilikos LnD refine and fury3, but with one more atk and spd! And this bad boi QUAD! While still sporting 47/34/28 without buff defensives stats!
Exemple of the greatness of this build :
FEH combat simulator with Arthur’s under 75%, desperation B slot, 6 atk/spd buff. Die only to Zelgius/Arden/W!Tharja, Bike (not all set), LA!Hector who have wary fighter (and survive with 4HP) otherwise he die, L!Hector die, L!Ike die, Ayra die, etc…
On a side note : You could make this build more budget with LnD/swift sparrow 2, with LnD and 3df, you’ll only miss 1spd but will be at 29/23 defensives stats (which are still not bad) and swift sparrow with 3df you’ll miss 1atk and 2spd but will have intact defensives stats
You could also go for a classic desperation offensive build who work wonderfull.
He can be build in almost anything and will be great (at high merges/DF though)
I willingly didn’t put any DF because they are a scarce currency and usually peoples don’t want to +10’s unit who aren’t they fav (and usually they just +5’s unit they use and don’t like the most)
That’s all for me, if you have somes questions, feel free to ask!