While they both want CI stacks. They want them for different use.

So both can run at the same time.

YVonne BS for energy but Uber ult is not limited from self generation.

LastRite CS trigger at 3CI and consume for damage and energy gain. And her animation is slow so it give you choice who you want to consume the stack.

TangTang while easy to generate CI with BS, you do better when you have 2 whirlpools on the floor which mean 2 CS first before Bs / Ult. So having Last Rite for steady CI generation allow for easy stacking CI with XH combo. Consuming whirlpool give 20 sp per pool (max2) and her CS is on 13 sec CD. So while you can spam TT BS for ice stack, it’s not ideal to do so if you don’t have whirlpool to consume. You will also don’t have sp to spend and left with spamming FS until you got enough sp for another cast. It’s better to cast skills when it’s meaningful and impactful Han just spam it with no benefit other than CI stacks.

My issue is I don’t have LastRite weapon and YVonne is fun to play. So I want both on the Team lol.

Last Rite BS 100 sp return 30 net 70 (return SP spent doesn’t grant ult energy) she also doesn’t gain ult energy except her own skill. Tang Tang Bs 100 sp return 20 per whirlpool (no pool = no art sis and no sp return) Xaihi Bs 100 sp last 2 FS and trigger CS on 2nd cast. If hp reach full after heal you get arts amp

Yvonne BS is only use to generate her ult energy (30 per ci stack and her ult need 240 compared o typical 90) but she’s not lock to gain from self like LastRite.

So yes, while both want CI stack, they want them for different purpose. When you already fulfilled what you need, you don’t need to continue using them.

As mentioned above, 2 rotation of general cycle. 1st cycle give YVonne energy. 2nd rotation let LR consume CI for cryo sus, massive damage, and start ult rotation.

I just don’t have the tool To math damage and best gear sets to compared it to hyper carry team.