As many times as I've participated in this event over the years, if some time passes between events, I tend to forget how to get to the fight scene. This isn't a zone you wanna get lost in. Most mobs don't SI but guaranteed you will run into some that do if you wander around aimlessly scratching your.... well, that thing ogres do so well.
This is from zone-in. If your guild is doing several of these raids back to back, you might want to evac back to zone-in, or run there, to follow these directions.
Zone in, open first door.
Turn right and open far right door. There could be a SI Temple Guard here.
Open door, turn right and open next door in front of a tube. 2 aggressive SI guards here. Hopefully your guildies have slaughtered these in passing.
Go up tube one level and exit EAST. There will be SI mobs up here, again your guild should have cleared the way, if you can't.
Head thru the door, SOUTH and then turn LEFT (EAST) then SOUTH to elevator tube to 3rd floor.
Up tube to 3rd floor, exit NORTH
Head north, watch out for traps. Head straight north, avoiding traps. They'll dot you with long-lasting damage spells. Need RGC to cure.
High Priest is straight ahead.
XTC is up here too... see my post there for easy peasy directions.
Tough SI mobs all over this floor. Your guild must have cleared first or you and group is capable of handling them. Or you're a rogue!