Wait, he gains 10 damage per statue killed? I assumed it was at damage thresholds as he spawns the statues. I don't see how I can handle a 180 damage boss, even with 5 lifesteal and platemail I literally won't have enough health to tank a hit from him by the end. So obviously killing more than a couple statues just isn't an option. PISORFing them around should be interesting and I might consider dropping IMAWAL for APHEELSIK in that case.
It's strange that you can wipe his resists even if you just move him around with PISORF without damaging him. With that effect, you can move him away from the statues while also wiping his resists for maximum efficiency. Also, pushing a couple of statues towards the level 5 goats will allow you to use them as bloodcows, I think.
If I can carry any mana there that would be nice. Seems like BYSSEPS isn't necessary for the bottom, so the final glyphs are going to be PISORF and APHEELSIK, maybe with GETINDARE (since it doesn't have any CP anyway). BURNDAYRAZ is not needed past the second phase, and the only reason I want it there is for the bonus EXP. If I get a nice spawn in part 1 like ENDISWAL, I might use that instead. BLUDTUPOWA isn't bad either, as with that, PISORF, and a couple of level ups, Gharbad will fall very easily. It's completely worthless in part 3, though.