The 'eschew components but XP cost' was something I suggested for a Sorc variant on the old boards, too. I think that it fits better with the 'sorceror's magic comes from within' concept.
Having said that, why does Forcecage cost so much? I understand the rationale behind charging high MC costs for some spells (like Stoneskin) but don't see why Forcecage is so powerful that a few castings could buy you a war galley, the slaves to run it, and the lighthouse to guide it in to shore.....