MoDaN is interesting but limited to cure/inflict spells, which aren't the most interesting spells to maximize.
And it does require maximize to even get it when you might prefer to get Empower Spell.
I think your offensive transmutations for the Medic without including the extra spells would be: ...Slow and (much later) Temporal Stasis. He got many transmutation buffs though, so Ability Enhancer is a real kicker.
If you're just looking for feats to have for the now until you perhaps replace them, well, some options are always good.
Feats that increase your saving throws, Improved Toughness for a few more hit points...
Extra Battlefield Treatment might be nice but considering your current options they might not be that useful.
You can also look up on some reserve feats to always have an option up your sleeve when just diving into physical combat doesn't sound like a good idea and when you're just not seeing the situation as good enough to waste a spell on your actions for the round. Touch of Healing might be a bit redundant but it insures that you won't ever have to waste resources out of battle to heal everyone up to at least half hit points.