This server's all about warriors, paladins and clerics. There's no actual raiding or anything like you know from standard EQ. By that I mean there is no CC, or slowing mobs, or any strategy of any kind. A huge chunk of the server population plays a warrior (or pally) with a cleric or pally on autofollow to heal them. Maybe you'll see a druid in the mix on autofollow too. Shaman are nothing more than buff bots as you'll learn (epic 3.0 buff). Guilds rarely NEED anything because like I said there is no raiding. Cloth classes are extremely irrelevant here with the exception of mage for CotH. BST's are pretty popular, because their end-game pets are stupid OP.
That being said there seems to be more and more people rolling the "useless" classes which are pretty much everything except the aforementioned. I myself play a zerker which is alot of fun. I think playing a dps class or a non plate class in general is refreshing here.
As to what you mentioned - There are some Necros here and there and they seem to have fun. You'll certainly gear up fast since there's no cloth competition around. 99.999% of the clerics you see are boxes of a tank class. You'll always have a group that's for sure. Either way you'll be dependent on warrior and pally friends to get anything accomplished once you hit 70. Make sure you join a guild that does Qvic + for their members otherwise you'll be doing ALOT of LFG or saying "WTB Qvic legs pst" and spend most of your time farming gold.