I was considering a mechanicum force, but reading through the regiment structure and size limitations, there is no mention on super heavy vehicles.
While i'm not planning on going all Ordo Sinister on this (titan legion with 12 imperator titans, only) i would like to have some sort of super heavy vehicles.
Either to transport the infantry with titan support, or forego the infantry all together and go for a super heavy force, needing other forces for close protection.

I am just in the idea stage, so i'd like a frame to build from so i don't go all "Herp di derp, i can has 5 warlord titans and 10 warhounds pl0x, lolz!?!! xoxoxo~~"
I'm not expecting many, so depending on if it's too few i might just scrap having titans all together, but considering i like the cuties, i'd like to at least consider having them.