gambits aren't essencial...they really aren't...you've just gotten soo used to them that you become lazy and let the AI fight for you. I have to admit, the only major gambit I use is heal...thats it, no complex stragety, just heal. The only reason gambits would be useful in KH would be because you can't control donald and goofy plus the fact that you would be too busy in a boss battle to switch to them anyway.