My friend's mom takes dilaudid 3x a day, 2mg, orally. She's been doing so for 4 months after hip surgery, and is in no way an addict. However, upon trying to quit, she cant... she cant even make it 12 hours w/o taking one, because she has a dependence and tolerance. 6mg/PO (orally) of dilaudid is nothing to me, but apparently wrecks her out. If you plan on using daily, I can guarantee you WILL become dependent. Hydromorphone is a short acting opiate, and once you get a tolerance, you will need to use twice a day just to not feel like shit. It happens pretty fast with IV, which you say you wont do, but obviously 4 months orally can do it... she's probably been dependent for 3 of those months.
Be careful weighing how effective dillies are to the strength of oxycodone. I dont know if those charts take into effect bioavailability. Oxy is something like 85-90% available by mouth to dilaudid's 30%. They definitely dont take into account how fast you build tolerance or how sucky the eventual withdrawal symptoms will be.
Snorting pills is going to wreck your sinuses in short order. It did with me and then I went to the needle (which I said Id never do) and never went back...except with oxycodone as it has no rush for me IV and *is* effective taken orally.