been playing a halfling thief, debated on taking some cleric levels to improve his overall performance. Took the trickery and war sphere because they seemed the most beneficial. My ability scores are s10/d18/co14/w14/i14/ch10 and i took mostly spot, hide, move, and disarming/defense abilties as well as getting the prereqs for a shadowdancer while leveling up my rogue. was gonna take cleric to augment my abilities, im 7r/1c atm. where should i be shooting in the overall picture? I was thinking of mixing some shadow dancer in as well but not yet i dont think.

You might want to pick just one level of Shadowdancer. That would give you the Hide in Plain Sight feat which is most awexome. Otherwise, I don't find that prestige class to be of much use. In pnp that's a whole other story ofcourse.

what about a level in ranger as well for dual wielding and favored enemy: human for bosses.