Greater impact: Probably FF2, because I think the story was a main setting stage for other Final Fantasy's to base it on. They just developed the story, and added new story-lines, but still keeping the basis from FF2.

FF1 was the beginning of the whole genre, but I don't really think it done any thing else, don't get me wrong I found it enjoyable to play, but not as good or as vital to the genre as FF2.

Crossblades: I might try your party next time, but at the moment things are going well, maybe the magic is starting to hinder me, because I think it's affecting my stats, or it's just hassle to level it up.