How important are crossed class skills at endgame? I've just started (27gla/15cnj) and will eventually go paladin for endgame raiding. However, do I need to make sure I have all cross class skills before I can really start any more difficult content? My next plan in any case is a dragoon, so that will get me up the warrior abilities at least for mercy strike (I might as well go the extra distance above 15).