Halloween Henry Team & Build Help?

+Atk -Def Halloween Henry popped up today from 3.50% chance after 10 orbs, with a 5* Clair from the full circle. I wanted help figuring out his best build and teammates, as I want him to be my main for an Arena team.

Build
I was thinking of using Gronowl+, as it really helps him defend even with -def. Bowbreaker allows him to kill Brave Lyn, and he can easily take care of Reinhardt. Armor March is a must as I need Armor units to boost my Arena score.
I'm still questioning using Fury 3 and Reprisal. Pivot or Swap might be good to bring him to safety. I'm also not sure on what Sacred Seal to use, maybe Brash Assault, Distant Defense, Atk+3...

Teammates
Black Knight and Hector seem good, as they have Distant Counter and Hector has one of the Armor Spurs. The last slot will probably be a bonus unit, but for now I'm thinking Tana. She has Guidance and can use Swordbreaker. Marth could also work to kill Dragons, but only Fae and Tikis don't die in one round from Henry if he has Fury 3. I could even throw in my own Young Tiki and give her Lightning Breath+ or 5 star a Nowi.

Any suggestions are appreciated, as I really wanna score better in Arena... I ditched Leo to summoner support Halloween Henry sadly, oh well.