Looks like no consensus other than maybe everyone agrees the come up is rapid.
Since individual reactions seem to vary so much, the only thing you can do is your own experiments to see how you react as an individual. Start at low doses of course.
As a side note, don't assume that you can extrapolate experiences with one 2C compound to another. I personally find almost no difference between nasal versus oral administration of 2C-I, unless I have recently eaten a large meal, something I generally never do before doing psychedelics, so I always just parachute it.