I hardly use any of them in KH1 because the controls to use them make them a waste of time. But in KH2...
Summons: I found both Chicken little and Stitch to be good at collecting Drive orbs so i use them sometimes.
Limits: I useually have one "quick-limit" equipped at all times but I don't always use it when avialiable because I save MP for heals sometimes.
Drives: I use them CONSTANTLY they are so powerful and they do give decent "growth" abilities when leveled. Once you find out how to level each form it is very easy to find a place to exploit its level method (e.g. a place with lots of weak heartless for Wisdom, or a place like land of dragons for drive orbs for master form)
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