What makes twinking a caster "great"

[Knuckle]

I know this is probably a trash post but I never really roll INT casters and I am curious is there a point of "twink" like a fungi t-staff monk with 41% haste type feeling at low levels for any casters? I feel like being gated by meditating no matter how much mana you stack must be annoying and limit the potential of twinking.