Edibles will treat your IBD much better than inhaling will, but it's not as effective for pain since the effects are not immediate. The best of both worlds, as you appear to already know, is to use both edibles and inhalation on demand when the pain demands immediate relief. Otherwise, I too stick to edibles because the effects are much more long lasting.
There is no reason not to use cannabis along side percocet, medically speaking. They each act via different pathways.
