As for healing your creature, negative. He's just fodder anyway, I've used my creature a total of 5 times or so, highly over rated IMHO. But he is useful like I said as a meat shield. If you have the battle tower you should have more potions than you can deal with. So mana is a moot point.
can get gear upgraded
at your trainer
, and the smith
. Costs abit but then again money should not be a problem either since you can send Dick, Harry, and Tom out for supplies. Go ahead and get 50 diamonds and sell to Sassan, for 9k, rinse and repeat. Same for alch, and ench. Remember your runners are FAST, give them thier orders, leave BT, then go right back...instant goodies.