I'd say you'd handle 8mg with no problem (I know you aren't a "lightweight"

).
Have you used 2C-P before? Just curious as to what your oral doses were for some sort of guideline.
My response to 30mg oral 2C-E was pretty comparable to an 9mg plugged dose of 2C-P. As always, YMMV and all that. I've dosed 2C-P from just a couple mg up to 12mg insufflated, and I far prefer the higher end of the dosing scale. It sounds like you might as well.
Fantastic substance, if you haven't tried it yet. I think I actually prefer it to 2C-E, personally, but I also think I have a lot more work to do with 2C-E before I cement that conclusion. 2C-P's body"load" was far more pleasant, just orgasmic energy coursing through me, but of course set & setting could have an influence on that as well. And the extended duration of P is just given to fantastic thought. Good stuff all around, never had a bad time with it. (edit: not to say it isn't possible) And erotic=excellent.
Definitely report back though