for my opinion it depends on the enemy if he got a higher % of their counter, because it would be useless even you get 80% of critical but he got 100% of counter.
crit deals 50% more than normal hit or skill hit, crit - counter= % of crit success, at AoE skills % is calculated at all the chars and most of times only Van have an high counter rate so with high crit you still can crit assaulters and support
all the skills here can crit so its the same in normal or skill hit both can crit and do 50% more dma also if the skill recover fury the fury recover crit (this game is so weird) ex: if Ikkaku crit he recover 37 fury (normal 25) also rukia recover 45 when she crits (only at one char btw normal recover 30 fury) also the normal crit hit recover 100 fury lol (if im right, maybe 75 gonna check this )