Shroomy
Adventurer
As for our Encounters, we used them too, and I got both healing inspirations from the warlord in both fights, and I still had to spend HS afterward (The first time I spent 3 after the fight and still was down 5 or 6 hp) I know our Warlock and Rouge both second winded, but I don’t know how many surges people spent after the battle.
On a side note can we make a potion of cure light that works like the Cleric utility power? That might help.
As the party's defender, you should get used to the idea of having to spend a lot of healing surges, which is why generally, you get more than the other classes; getting hit is part of your role. In our game, our fighter burns through healing surges more than the rest of us and our two leaders are often using our healing abilities to keep him up and running. In your particular case, since your compatriots have low defenses, you're going to be extra busy.
You can brew healing potions if you have the Brew Potion ritual (its a level 1 ritual), however, it doesn't work like the cure light wounds utility power, as you still need to spend a healing surge to get it to work. They're generally good in a pinch (and only cost a minor action to use), but you usually don't gain as many hit points from spending a healing surge normally.
As for your situation, well a lot of it is going to come down to learning the ins and outs of the system, as well as your PCs. There's nothing wrong with spending a daily power in your first combat, but you don't want to do it willy-nilly; don't discount at-will powers, as they're often the best option for any given situation.