Well you can always stun or freeze the enemy first before pulling out the melee weapon. Also, if you're standing near a rift or if you take the Knowledge Weaver skill tree and "Friends in Need", your HP will regen, so it's less of an issue.Anyone else find it impossible to use the melee weapon without taking damage?
Personally, I prefer a more ranged playstyle, but I can see the advantages of the bladestaff / warhammer too. It does more damage against heavies that are frozen, and it's spammable. If you use the crossbow, you notice that if you spray-and-pray with it instead methodically aiming, the targeting reticle quickly gets bigger and bigger, causing a larger spread and less accuracy.