For those running Ares with Legendary Hector, Brazen Atk/Res seal is his new best seal.

Hector's Ostia's Pulse frees up Ares seal slot that originally uses Quickened Pulse. That seal slot can use this Brazen seal instead, and it is indeed, very deadly on him (although not considering how potent the Witchy Wand can be).

Ares with an Atk boon has 55 Atk unmerged. When he's in vantage range, the Brazen effect is taken into effect, giving him 62 Atk. Any foe that attempts to kill him will have to survive 78 Atk (Base+Draconic Aura) on his Vantage counter. Devastating indeed. There are still a lot of options for this seal (Lyn and other desperation users).