Theorycrafting with Ryu: Hawkeye

Is there a slaying Axe? I assume not yet though we will have on in the future!!
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He can tank fully buffed mages very well and can easily get them on return yes, though if they have desperation you'll die THOUGH, In most real situations foes depseration never gets used because players are smart enough to take them out of not be in their range :pppp
so this wouldn't be an issue for you, but if players are attacking you their'll be able to snipe him if need be (granted with more effort then hector).

Off the bat seems highly effective for mage baiting though I'm not sure how many uses of it you'll get, likely 1-2 if you play your units right.
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My issue is using a hector because he's well..... hector and I've been trying to get him for like evvverrr.
Build is effective for what you're seeking though a unoptimal Olwen or a optimal reinhardt can get him still. (QP reinhardt)

(Should be noted fury & hone & fortified Olwen with a boon in def or hp will live and destroy on counter---- Normal IV's combat below.)
Olwen adds total bonuses to attack, increasing attack by 24 [Blárblade+].
Olwen attacks. Triangle disadvantage reduces attack by 20%. 28 damage dealt.
Hawkeye HP: 48 → 20
Hawkeye counter-attacks, ignoring distance [Distant Counter]. Triangle advantage boosts attack by 20%. Resolve combat as if opponent suffered a 30% defense/resistance reduction [Moonbow]. 35 damage dealt.
Olwen HP: 34 → 0
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Reinhardt with +ATK - Res (Death Blow 3 and under hone cav)
Reinhardt gains 6 attack by initiating combat [Death Blow 3].
Reinhardt attacks. Triangle disadvantage reduces attack by 20%. 15 damage dealt.
Hawkeye HP: 48 → 33
Reinhardt attacks again immediately [Dire Thunder]. Triangle disadvantage reduces attack by 20%. Resolve combat as if opponent suffered a 30% defense/resistance reduction [Moonbow]. 24 damage dealt.
Hawkeye HP: 33 → 9
Hawkeye counter-attacks, ignoring distance [Distant Counter]. Triangle advantage boosts attack by 20%. Resolve combat as if opponent suffered a 30% defense/resistance reduction [Moonbow]. 37 damage dealt.
Reinhardt HP: 38 → 1
Reinhardt makes a follow-up attack. Triangle disadvantage reduces attack by 20%. 15 damage dealt.
Hawkeye HP: 9 → 0

Nice build against duo blue mage meta =)

This build for Hawkeye is unoptimal, Fae will do the same but will also take care of Hector&co (which is part of the meta that you want to kick ass right?).

Hector will also do the same job in better, thanks to his higher attack, he can take care of glass canon (i.e. Nino) before that they throw their second (lethal) hit on him. In fact, my +Atk/-Spd Hector kills Fury Nino (common Nino) in one shot, just as many other threats (like archer and tanky blue mages, like Voldemort).

Of course, Hawkeye can do that too thanks to KillerAxe+ and his quick special trigger, but past this point, he loses in reliability, while Hector doesn't thanks to Vantage, and actually profit his charged Special to hard-counter even more threats.

DISCLAIMER : As Hector, Raven & Hawkeye are my favorite units, I tried many many builds for them, and they all have very good opportunity to be meta-crushing. But you build is just a "specialized counter against blue meta" that isn't really breaking the meta itself, since it lacks reliability (you can only use it as a Bait, on the offensive he will rarely kills anything, plus he can't counter reliably common green units like Hector, Julia, Minerva, Sonya, Nino, Raven and other version of Hawkeye that are more balanced).

In brief, it's a unoptimal build offensively, and barely effective defensively. I recommend you to better testing on Kagero Chart, using filters and overrides on meta units.

You can also find some really good date analysis on the meta on Reddit.com :

https://www.reddit.com/r/FireEmblemHeroes/comments/6rrquc/feh_arena_metagame_tracking_charts_and_text/

https://www.reddit.com/r/FireEmblemHeroes/comments/6p21ua/i_kept_track_of_every_enemy_unit_i_saw_in_arena/