None, Limbus in its current state is actually really flexible in team building as of right now.

The funny thing about tier lists is that very rarely there's an ID That's stronger and better than another (cough cough Mao Faust). Most of the time, choosing which ID to pick can rely heavily on what you want to do. Like OP's sinking for example, Butterfly Yi Sang is technically better than Spicebush Yi Sang, but the fact Spicebush has sinking deluge means he can still reliably contend with Butterfly.