I went there a few nights ago at lvl 50 and solo'd entrance. My gear is fairly decent (have velious class armor on all but chest slot, also have Neriad Shawl - nothing else is insane and I don't know how big a part gear matters for a pure caster).
I've not been able to play that much but have dinged 51 at ent and plan to move down to basement now that I can mem Theft of Thought (ToT). I actually ran into North as soon as I dinged and logged out at the SS in there. Getting through was not bad. Just don't get a crit lull resist and you're fine
[You must be logged in to view images. Log in or Register.] If I had the zone to myself I would probably sit in north instead of basement and then pick off nameds when I can. But I'm fairly sure I won't have the ability to clear North reliably yet and then can't really claim it from someone else wanting it.
Anyway I don't find myself getting many charm breaks (236 charisma buffed) and I've only gotten a crit lull resist twice. That being said at 50 you definitely feel vulnerable. Mobs hit hard as heck so it really pays to be effecient in terms of positioning as slacking off while breaking charm to finish mobs and getting hit for a few rounds while spamming stun or root because you didn't stand far enough away can really cost you long down time or death.
Regarding the break in this is what I do:
Berserker Spirit and Rune. Med to full. Lull the Skorpiks at the zone entrance globe. Cast IvU on yourself. Go to entrance globe and face north, then click key on globe. That way you are facing north and can instantly run north when you finish loading. You will want to do this as north is the safest place. Stairs to North. The two entrance mobs mostly roam on the southern half of the platform. Their patrol pattern will occasionally take them to the foot of the north stairs but your best bet is those stairs. If it's 2x undead then obviously you are fine. If there are living then you have a decent chance to either move fast enough as to not aggro them or to only drag living mobs to foot of north stairs where you can stun and CC them.
It can definitely go wrong but you'll mostly be ok if you can avoid getting aggro on a skelly.