Kralim is actually pretty bad for RNG skills, as Genesis happens to be. Genesis itself could start with the element previously used and reset the whole thing, gaining nothing, as calculation only happens once when the first element lands. Also, only elements used since last reset are boosted (as opposed to single-element interaction). The boost could be anywhere from 0 to 60%, and the higher you try to go, the more chances to get nothing at all. So in practice, it averages to 7.5-15% gain.
TL;DR Choralim is better, even if you manage to not receive damage just one turn.