Yeah, subs are very strong IME. Usually 2g is enough for me; though as you say the lower the harder as its confusing trying to maintain an ego. I guess thats one of the problems with LSD; I've personally never experienced ego-loss or what-have-you with acid even at high doses- ~600ug give or take (high dose for me at least)- a lot of egoic confusing and transference, but not the complete wiping away that mushrooms can do, relatively easily. Plus, while mushrooms can have an awful body load, its less noticeable the more detached you are/higher the dose you've had, whereas with LSD physical effects become quite irritating at larger doses IME.
I do plan to try the 'heroic' mushroom dose, but I am quite tentative.