06-26-2006, 06:11 PM
Each floating necropolis can spawn multiple invasion points (= chained crystal + lots of UD mobs.) I know they can spawn two but I do not know if it can be more or less.
You can find an invasion point by looking up at the floating necropolis and running after the blue-black bolts coming out of its underside (these bolts are heading to a crystal.)
One necropolis in Tanaris is just south of Gadgetzan and one is south of Broken Pillar. In EPL, one necropolis is just southwest of LHC and one necropolis is pretty near the road coming on from WPL. This is slightly useful to know because the necropolis near the flight point is more likely to have its invasion points camped.
The shard in the middle of the invasion point is weakened somewhat every time an UD is killed. It's replaced by a damaged shard when its health goes to zero. At this point killing normal UD doesn't seem to weaken the shard any more. 4 technicians come which can be turned into Shadows of Doom. I suppose they could eventually repair the shard and make an undamaged shard out of it but of course this doesn't happen if players are about.
Ater all the technicians are killed sometimes (always?) the mobs continue spawning and eventually four more technicians are spawned. After these four are killed, the central crystal/shard goes away and the invasion stops at that point for at least a little while. I haven't seen 3 waves of technicians yet.
The Shadows of Doom can be slowed in a variety of ways - Crippling Poison, Curse of Exhaustion, chilled by frost. They can be stopped for a little while by Frost Nova and other means as well I think. Thus, they can be kited by an appropriate 2-man crew in non-epics. Their melee is fairly harsh (700 dam or so?) but their ranged attack, which looks like Mind Flay, doesn't hurt that badly.
None of the normal undead spawns around the invasion point are ranged attackers. This means that massive farming is possible with a mage and a priest, additional aoe being helpful. Since each normal UD is worth 5 AD rep (Shadows are 50 and drop a Corruptor's Scourgestone as well) this is the fastest way to get to Revered AD rep that I know. The normal UD at the invasion points stop giving AD rep at Revered but still drop Invader's Scourgestones.
I don't know the mechanics of all this if the party is in raid form. I imagine it would be just the same except that the two main Invasion quests (kill a Shadow and gather 8 Necrotic Runes) would not be doable. I suppose a decently equipped 40-man raid could clean out an invasion point in a few minutes.