Power Patch refers to the one we got between OB and Official release.
It made a bunch of changes, most importantly (for Dainn): IA Cancel and AAS cancel-in-any-direction.
And do note that there are 2 Summon Meteor combos listed, one in 101 and one in 201. The second is a hell of a lot harder to do (especially in lag), and is pretty useless outside of Stage. If anything lives after that point in stage, I suppose you could try chaining Icicle Rain.