The goals in my list 1/ was to bypass the Weirdnob Shaman coz he brings nothing but the TP on the table, 2/ Two cabbages, one with Amulet, second with Destroyer/Fast'Un. That is three artefacts, so 6 heroes. I have a variation with the weirdnob, two artefacts, 4 drops and one less warchanter.
Body counts are fine, Brutes have a 10" charge T1, 3d6 on 3+. That is three menaces (2 MK + 10 brutes) and three warchanters to buff them. I would run 5 more brutes instead of 10 ardboys but don't have models atm.
Best options of Ironjawz are Ironsunz + Fungoid + TP + MK Destroyer/Fast'Un + 10 brutes.
10 brutes + violent fury + waaagh = one dead Mega-gargant
MK Destroyer + violent fury + waaagh (AKA rend -3 flat 7) = one dead Archaon (with full reroll and +1 save only)
MK Fast'Un + TP = 3" charge with no redeploy/unleash hell options
I love reliability. Reliability wins games.