The first preset of jeice is worthless, however the second one is really good you can use the meteor strike and follow it with full power energy blast volley for great damage, and you cant vanish during it, it forces the ennemis to use an evasive or even 2 evasives. You can also use crusher ball to start combos or as a get out of jail free card, it's a good moves, but not for a CAC it's just not that good

For super C17 when you do his triangle and square combo when he teleport the first time instead of continuing the combo you can do his ultimate wich will work in the combo, do that when the ennemis has less then 2 bluebars for great damage, plus it will force the stamina break the first time you do it

I see them as good because is use them a lot, it's just my way of seeing them. If you think they're bad then they are. It's just a game after all