S!YTiki IV screwed?

I have the same one, and she still mangles pretty much everything you need her to for Arena Assault, which is basically Grima and any other dragon other than perhaps speedy Nowi. Just run her with hone dragon/fliers and she'll do her job well.

-atk IVs on effective damage is certainly a bummer, but Tiki has a statline that can be salvaged with any IV, in my opinion.

From my experience of having a -atk(though she's +def but still close) She's still good, But I recommend to try and get a "better" IV but incase you could'nt get one or you don't want to spend more orbs then You can build her defensively.

With double close defense, quick reposte and flier/dragon buffs it should work pretty well

https://fireemblem.gamepress.gg/q-a/making-case-all-ivs-sytiki-are-more-usable-without-summoner-support

I mean, if you could get another one then obviously that’d be better. But if you can’t, you’re just gonna need to work with this one.