Which Chill Skill for Marth?

at +10 merged, +atk brings marth’s attack to 54 as opposed to his normal 51, and with +spd he’d be up to 41 as opposed to his normal 38. it really depends on whether or not you’d appreciate a bit more attack or a bit more speed. personally i chose +atk -hp for my marth, but i think i would’ve went with +spd -hp if i had those ivs available.

i think i would choose chill defense over chill speed, and if i’m not mistaken it’s more readily available then chill speed is. but it depends on the team you’re using too, and if the decrease in defense or speed would be more beneficial.

If you're building him for your arena core i'd recomend you to get him with +spd -atk or +spd -hp as you don't need him to take kills, spd is there to help his survivability in case you need him to soften someone, or even +def can be a decent option.
For the Chill spd i would say that Chill atk will give be the most as you never know if you're going to use someone who hits def or res for the bonus unit but it's a bit premium, i'd say that also Chill def is a solid option as most bonus unit you're going to use will be hitting def

Considering the Askr unit 'should' be getting the kill, either Defense or Attack whatever you think would help. Speed might help Anna, but I think overall defense or attack would be better.

I'm building a Marth for my Earth core team, right now he's neutral IVs. I'm looking for a +Res, -HP for mine. He won't be attacking much, and when he does, don't need him to kill the unit with +attack or +speed. Honestly considering leaving him neutral though. He's +4 already and already have him refined with aether, Fury 3 and Drive Attack C skill. Been using Renewal for now, but started to think of a good/accessible chill skill to use.