Sigurd IV's. +Spd/-Res or +Atk/-HP.

I have managed to pull 5 sigurds as pity breakers since he was added. He is really great, I use him in Arena Assault and especially in the current Tempest Trial.

All my pulls have had good IV's, making it a tough decision. I am currently running +Atk/-HP, +1 merge with standard build plus Bonfire (Pictured).

Now I just pulled one that is +Spd/-Res. He would have 35 spd unbuffed or 36 after I merge him. He would not be getting doubled very often.

Normally I don't like investing in speed in middle-speed tier characters, but this might help his tankiness. And I could replace Crusader's Ward with something like Chill Def or Chill Spd.

Thoughts? Should I change up the IV's? I do also have a +Def/-Res and +Atk/-Res but I am already leaning towards the first two options.