Oh boy, the amount of bro science is just piling up here isn't it...
1. No, an Ai should be used to keep your E2 levels in range, preferably arround 20 - 25. In no way does it make sense to let E2 raise to a level where you will get sides and only then start using an Ai. What, do you want to cure gyno, acne, high blood pressure or prevent it?
2. Oral only cycle's are totally valid. There is no law prohibiting us from doing them. You will get results from only 40mg dbol, period. Sure, a lot of that will be water, but there will also be some new tissue. OP wants a quick recovery and a 4 week cycle will absolutely make for a quick recovery. Is it better to have test? Offcourse it is, but it doesn't make much sense for only 4 weeks and especially if quick recovery is a condition. Dbol ony cycles have been ran since "day one". All the old school BB's did it. Dbol converts to estrogen and in small amounts to it's own version of DHT. So in a sense you are covered with e2 and dht, so you shouldn't feel to bad. Granted, some users don't like dbol only cycles, but a lot of others do.
And going back to estrogen... Dbol arometises strongly, and it's not just that, it arometises to a stronger estrogen - not normal estradiol and you really don't want to let it get anywhere near out of control unless you want a gyno flare up, or serious BP issue's, etc...
OP: I would add a nother compound to the mix. A dry compound like var or winny ... But anyway good luck with your cycle!