Star_Seer

I love my claws/invulnerable scrapper (far more than my MA/regen) im even experimenting with tanking using corner pulls with the aoe taunt in pesence pool and and the point blank aoe fear when the mobs get to me, that way I get massive buffs to accuracy and defence with nothing trying to hit me (all feared). Focus and air supp to keep the boss knocked down till dead, mop up minions with eviscerate.
The set bonus from Glimpse of the Abbyss is really handy too.

I try to stay a few steps ahead of teams these days by leaving them to mop up the stragglers while I start the next group, that way things are under my control, which I much prefer.

I always put my anchor on the meanest looking boss in the room as he is probably the one you most want to have debuffed.
When he goes down just switch to a different durable looking foe if you feel there is still a need for the debuff to be applied.

If you invite a low level Dark Miasma defender to your team make sure he is SKed to the highest lvl team member. Twilight grasp is required to hit in order to heal.

I didnt bother with the human form shields on my Human/dwarf PB. If I can't handle incomming damage with the self heals I use dwarf or light form. It gets annoying turning all the toggles back on after being mezzed, also not having human shields probably saves some endurance for atacks. I really like pulsar, seekers and solar flare as panic buttons too.

I have a claws/invln scrapper in the mid 20s, i think its actually a really safe combo and a lot less run of the mill like MA/regen which i got bored of in the mid 30s.
Instead of the passive resists i picked up aid self, that and dull pain should keep you upright

If you are having trouble tanking properly at low level try sticking to smaller teams - 2 to 4 players. You should have no trouble gathering up the mobs for your team the deal with. Also I never raise my difficulty before getting dual origin enhances at least.
The fastest leveling duo I have ever been in was my Fire/Fire balster and a friends Ice/Ice tank. Tank gathers mobs, balster runs in and destroys them, works like a charm.

The Hollows is mostly for teams, try asking a group fighting the foes you need if you can join them for a bit.
You should also be able to return the contact that sent you to Wincott and get a new mission.
I would suggest dropping the mission to kill 10 circle of thorns in Perez Park, using the drop mission option.
If you cant drop it then try around the northern edge if the woods, they can mezz you so get some breakfree inspirations first.
Hope that helps