Usually by keeping Joss at back find you can hide him with terrain & find with peacekeeper,hoff etc that oppenent has more pressing matters.Find by late 2/3rd turn somwthing you want him to charge so goes in.Burns 3 power counters & 2 wounds to reactivate which then flurry and kills what he needs.At end gives himself 3 armour with 3 power counters earned by flurrying & takes some shifting!Favourite target has been stitched so far!Esp good when know enemy have to be somewhere because of schemes.
I tried the attendant for a long time & could never understand why I struggled with him.On paper looks good but never done what was needed.I think in the end it came down to speed.Was always spending his 2 AP to get to Hoff.The MTK does not need so is a (cheapish)construct always close where he needs to be.The fact he can heal,cast spells,give a book(never used that)is a bonus!Usually think he's worth his points for +1casting and ability to give fast when needed!& again if people are spending ap killing him their not targeting your expensive 3 models& master.People don't attack guardian cause no real need to!
Cheers
Justin