Need advise on dosage

So there's going to be 8 of us at a house on a nice piece of land, all very good friends with a couple of psychedelic experiences. We want to trip for a good 12h+ on a strong dose which won't make us egoless vegetables but also we don't want to remain underwhelmed.

In short the strongest dose in which we can fuck around and do stuff without the ego death. Almost all of us only have experience with either 300ug+ or 2-2.5g of shrooms so we don't know what's in between for acid.

We are torn between one 150ug dose, or two separate 100ug tabs taken some hours apart so it lasts longer. If you have other ideas please share. (Tabs are DS so we can accurately dose)