As for 8 gates, my pages are pretty much the same. Every page has water, fire, lightning, earth, wind (5 main stats) and quick (because init is still the best stat). As for the last... i generally use explosive (critical) as i believe it's the more usefull in combat. I had tried with mixed results gale (combo) if i use tsunade hokage to increase the chance of 9-12 targets heals and sand (dmg reduction) if i use sailor sakura.
Really, really, really mixed results.