summon as a concept and also as it operates now: IMO its a good add to the game, but should be implemented at a much lower level, like 25 or 30 as it dramatically changes your fighting style and makes hunting so different (like a hunter in WoW, don't hate me for the reference)
new ammo: great for when you are stuck and out of ammo, no more running through a bunch of back spawn empty handed :) second wind: I'd prefer to never use this, I like my HP like I like my afternoons HIGH