Here are all of my stats and my "main" spec. I have a "full tank" build on Spec 2, but I almost never use it. You just don't gain enough survivability for the loss in DPS. I did swap to "full tank" on my first Cyclops kill, but realized I didn't really need it, and now just tank him in full DPS/2H spec.
I'm able to easily clear Cyclops, Pyroth, and Dragon as far as "world bosses" go. I still haven't done Urzak and probably won't for a bit more gear/vet levels, since I think he's going to require 12k+ HP. He hits like a fucking monster during his enrage. One thing to remember for enrage phases, is that you want to go into it popping your Leadership VET skill right as it starts, to try and burn through it. Also, save all your cooldowns and whatnot during that phase.
If you still need to farm gear, don't forget about Fabled bosses. There is a really good tank shield (that isn't replaced until you can kill the Captain in Winterforge) that drops from the first fabled boss in Lost Catacombs. There's also a bitching healer shield that drops from the Fabled Ancient Spirit in Abondoned Mines. Lizard dungeon also has some solid fabled gear, but the first boss does hit like a truck - he's definitely doable once you get your healers in solid gear and some more HP. Secondly, make sure you're gearing your mercs properly. Healers need a ton of wisdom before their heals are actually effective. Int to bump up their mana pool helps, but wisdom is their big "difference making" stat. Also, I went full CON build on my Warrior. Literally all of my points were dumped into CON. Splitting stats isn't really all that effective in this game and you typically want to focus.
Also, while Ranger is the highest DPS Merc, his AC debuff is overwritten by Warrior's. So, I typically like running Rogue, since he has a nice melee damage debuff he applies. Based on your screenshots,
Slaanesh69
, you just need more gear. Your Cleric looks a little undergeared in the mana department and you DEFININTELY should be at a much higher health, considering you're 10 VT levels higher than me but have almost 2k less life. Definitely spend the 3k gold to dump your stats into CON and possibly look at your VT points as well.