A champ kinda needs a little of both to be good in the current meta.
Obviously both
You can focus on one but to be top tier you need to have both. Warlock and Cgr are perfect examples.
Obviously you want good damage with some utilityBut if it's all damage and no utility vs all utility but zero damage... ill take the damage.YOu can power through any content with the right damage... its expensive but you can clear. Utility cant always do that.
If you have no damage but decent utility you have something like ebony maw or king groot. If you have good damage but no utility you get someone like cull obsidian. I think I’d rather have someone like cull
This shouldn't be a question. Of course you need a mix of both in today's meta, but a champ with tons of damage and barely any utility will get suck on paths in freakin Act 5.