I think I would still look at boosting str to 10 still just because of encumbrance issues with Full Plate and inventory, but other that that it sounds like you have a good idea of what you want to do at end game (just sit back and heal unless I'm mistaken).
Based on that I would also add a couple points to cha because you won't miss the 20 HP and you will end up with a signifacant increase in the burst/aura dept. which will be nice for your build.