Just thought I'd post up the build and results of the first all mesmer urgoz run. The purpose of this trip was to gather enough information to refine the builds so as to make a serious attempt on Saturday.
The team composition was
2 X me/W stances with Phy and ele resistance. - Black Guinivere, and Gwen Starlight
1 X Me/n with Consume corpse, BIP,BR, weakness and epidemic - Don J Dunrandal
2 X me/e fast cast fire ele's - Benjamin Naoran + 1 leaver

1 X me/e Warder and blinds - Geraldine Griffiths
1 X Me/E Interupt/shutdown - Me
1 X Me/R trapper with eoe - Anima Evasen
4 X Me/Mo Aegis, heal party and condition removal - Aurora Vicious, Gey Gordon, The Con Artist, Quick Rinoa
The Team starting out after killing the suiciders
In full combat
Are there no end to these dredge. At this point one of the Me/E's decided they no longer had time, so left us. Alas reducing our damage output considerably
Room 2
We had killed the degen tree and most of the blood drinkers, then one of our me/mo's had an error 7. This was on top of extreme lag(10 second freezes) by some people which made this pretty tough going for most and impossible for some. Seeing it was early am for some, and just a test run we cut it short, rescheduling for later on when time and lag allows full attempt could be made.
The key things we noted were pretty much the build was spot on, except for the warriors which needed more evasion stances such as bonetti's or even glads defense.
At no point was the party in danger of wiping and it was felt that without lag, leavers and Err'7 then reaching Urgoz himself was very achievable given enough time. We took it slowly, so in future runs it may be faster but I would estimate allowing 3 hours to get to Urgoz and maybe another 45-60 mins of trying to kill. I guess the rule here is if you are under any kinda time constraint, don't come.
The only thing we had left to test were Thorn wolves, but seeing as the sheer amount of melee damage we were under at time I have no doubt, with careful play these would pose no real problem.
All players did superbly and did the growing tradition of these runs proud.
Thanks
Shan