Build a gish off the Inquisitor as a template...
I've built a couple of new classes, at least one of them going into an upcoming publication. I created a samurai, using the ranger as a template, I just replaced unneeded abilities with ones more appropriate for a samurai (like Ki instead of divine spells) and maintaining the former abilities progression, but used same BAB, saves and the Combat Style with five different appropriate samurai styles.
It might worthy to try and build a Gish using the Inquisitor as a template.
Replace judgments with something else that's more "gishy" or just different kinds of judgements more appropriate for a wizard or sorcerer. Replace divine spell list with arcane spell list, though would be appropriate to limit the list, just as the inquisitor is limited - absolutely up to 6th level spells only. Then just stick with the Inquisitor on most everything else. Team feats seem appropriate.
By using the Pathfinder Core and Advanced classes as a template, I can feel fairly safe that my classes are Pathfinder balanced by design, though it would still require extensive playtesting and tweaking, but it might be worth a try...
GP
