Thanks for all the tips and tricks.

I read up on both The Nexus and Arzol Nerub.

So last night I used the random dungeon tool again and guess what I drew first time around. Yes, Arzol Nerub. Instead of waiting the 15 min for a new dungeon I tried my luck again. I actually made it to the first boss and got him down to 20% health (in like fith try) but finally wiped probably due to my own healing/tanking mistakes.

When I came back the sequence had reset and I would need to do the 3 battles prior to the boss, and I though screw it and picked another Random Dungeon. I got the Nexus - but unfortnately I was running out of gaming time for the night. So I just went directly for Magus Telestra to tryout the glass hugging tip.

It sorta worked for me. I had some trouble getting her in range, especially when she moves about.
It was working really well one time, until my toons apparently pulles aggro from patrol I haden't cleared (mental note till next time).
I guess you live and learn. But I can feel i'm improving in controlling the fights. Its fun but a bit expensive compared to my low lvl.