Master Enslave

[Baalz]

I was trying to figure out what I need to have to be safe to teleport in a astral-9 pretender, cast master enslave, then returning. The manual doesn't specify the mechanism that gems use to reduce fatigue, and the last thing I want is for my pretender to pass out from the initial casting to sit and die if the MR rolls go badly. So, assuming I've got a choice between astral boosters and penetration boosters, what's the best way to go? How many pearls does he need to be safe?

An astral-9 mage can use 9 pearls, 8 of which go towards the Master Enslave itself. He's got one above the minimum casting paths, so he'll initially generate 800/2 fatigue, minus whatever 1 pearl can reduce. Guessing that's not safe.

Astral-10 mage can use 2 extra pearls and starts with 800/3 fatigue. This is really where I'm wondering if this is safe, can an astral-10 mage teleport in, cast Master Enslave using 10 pearls and then get out, or does he need to be Astral-11 to pull this off singlehandedly? As he'll be teleporting in by himself (presumably against a significant army) I don't know that light of the northern star or power of the spheres will be a good idea...

Also, my pretender has blood, any thoughts on Master Enslave/Reinvigoragtion/Master Enslave/Returning?