Hi there folks, a comment from a fellow player sparked my curiosity today and I was wondering if anyone would be able to give me an answer/general opinion?

:Backstory:
I was messing about on a new little Helf rogue I'd made today, enjoying the fact that I could out-dps barbarians whilst using a greataxe (TWF doesn't seem worth it until I get Improved or Greater TWF). I notice a group for Chronoscope, claiming to be running it "At level", and so I apply. I get declined immediately, and when asking why, I'm told that I need a minimum of 100 hp to join, as on normal "this can be quite a tough raid".

So here's my question, is it possible/expected for a level 5 rogue to get over 100 hp? I started with 14 con, wear a lesser false life item, +2 con item, toughness, the one toughness enhancement available and yet I'm only on 87 hp. And forgive me if I'm terribly mistaken, but if I have evasion, lighting, acid, fire and frost resistances of 10, diplomacy maxed as a panic button and a healthy dose of common sense, surely I'm able to run Chronoscope normal?

(Bonus question: Is this "You don't have x amount of hp, you can't join" common for rogues? I normally play melee classes, so I'm not entirely sure about end-game goals for rogue hp, I just take items where I can.)