Yeah u could CC MULTIPLE ENEMIES (not single) with 100% chance in current system in the first round with different builds w/o any tactic (and yes there are enought AOE CC in Aero and Hydro schools)
and u COULD NOT 100% CC in suggested system (even in round#100, cos of diminishing returns if not ROUNDED)
all other ur suggestions - just NO. You dont understend what problems we are trying to solve here. And its not just one you talk about.