250mg every 5 days is only 350mg a week, which is fine but low. Plus you have to remember odd injection dates. No biggie for some, but it would drive me nuts. I'd just hit 250mg twice a week- mon am, thur pm and call it good.
At 250mg e5d I'd guess your ai is to high when you aren't on the Dbol, but would be good with 250mg 2xWeek. I'd guess that .5mg adex e2d while on dbol and e3d while not should be good, but it's very individual. Grab some nolvadex to keep on hand in case you have any problems with the Dbol or otherwise. It's cheap insurance and you don't know how you're going to react and it'll stop problems faster, more consistently, and better if you need to dial in your ai.
I'd just skip the Dbol this time, but if you want, I'd run 20mg once a day (1-2 hours pre-workout on training days)
The Proviron isn't going to add much and I'd skip it unless you already have it. It can be a nice addition but, again, doesn't add much besides sex drive and mood which will already be high. If you have it just run 25mg twice a day during the cycle and up to, but not with, pct.
Do you have a zinc deficiency or planning on one?