Quit for 4 years, you'll get higher than you've ever been! Thats what I did. Smoked some mids/regs and got fucking blasted off a joint and half shared with 2 other people!

Your tolerance should be pretty low. You know, people with high tolerance get rid of it faster. I hope you've been eating a lot, that increases your metabolism. I would say you've lowered it, but I'm not sure how much, should be more than enough to get a great high.