I've done AMT via oral, snorting and smoking.
Snorting (what I believe is the freebase) was incredibly painful and unpleasent. This is coming from someone who will happily snort 2C-B, 5-MeO-DIPT etc. In addition, it didn's seem to offer any improvement in speed of come up etc over oral.
Smoking isn't that bad really - the first time I tried it, it was a bit harsh and unpleasent, but subsequent goes have been very managable. You're only going to be smoking 5-15mg usuallly, so its not a lot of material.
I'd say go with oral, and top up with smoking - be cautious though, even when smoked it takes an hour to come on. After taking 25mg oral once, followed by 10mg smoked a few hours in, it didnt seem to have made much difference, and I was considering smoking more. Very glad I didn't, as half an hour later I was wasted.