Heh, speaking of elite groups, just did thirsty with one such group...
5 of us, the other Warrior dropped because we didn't have any human monks.
--> Me, a level 19 W/Mo (Succor whammo, with a spatha. No FDS for me)
--> A level 16 curse necro
--> A level 16 interruptor/archer ranger
--> A level 17 trapper/interruptor ranger
--> Alesia, the henchie ;D
We did the first round in 1:39
Second round in 3:21
Third in 5:41
But, of course, we were t3h suXxorz cuz we dint have 2 monks an 2 nukerz and 2 \/\/ l-l /-\ /\/\ /\/\ 0 Z with teh f13ry dragon sword and t3h m3nd1ng. Lol, we went back there after we did the mission, and taunted all the level 20 W/Mo's and level 20 nukers spamming 'LFG 1337 group - no noobs', 'LF 2 monks for mish and bonus' and 'go away ragners, nekroz and mezmers u suck go bak 2 pvp'. 'Twas funny.
So, apologizing for my pointless tangent, kindly ask for a disruption ranger for taking on the priest and monk boss, if one isn't available, use domination magic for anti-caster spells. Yeah, and go back to Denravi and Amnoon just to check what spells you missed. I'd reccomend earth magic for this particular mission, Earthquake is now available to you, Obsidian Flame opens a whole can of whup-ass on bosses and priests, and Ward Against Melee is generally useful. Oh, and bring a Signet of Capture (or two...), each of the bosses has an elite for each class. Yay for you, you get your first eiltes to play around with. Anything else? ... Oh yes, worry not about elite skills, there are very few available to you right now, you'll get a whole bunch more to hunt down after ascending. And do try to have fun. ^^