I usually bump up to 750mg after starting at 500mg; however, I have bumped it back down to 625mg for the final weeks of cycle. 625mg seems like my sweet spot and I didn't notice a particular difference between 625 and 750. I like 625 b/c it allows me to extend my supply further and offers what I feel is similar benefits as 750mg.
I plan to up as per heavy's or princes thread on how after 8-10 weeks you need to ramp or end. I plan to ramp the test up 125mg a week, would I need to do the same for deca? Of course only like a 25-50mg on deca.