Well, my Leafeon set was also designed for OU rather than UU (I always assumed it was OU/BL anyway). That's why it had Aerial Ace, since stuff that might try to switch in on me dies to it (Infernape, Tangrowth, Heracross, etc.). In UU the only advantage to AA is hitting Grass types hard.
As far as my calculations go, I used to be a text RPG updator (Pokerealm's Pokemon Topaz when Pokerealm still had vBulletin forums). I held on to their RPG calculator program. I can just put in the attacker's attack power and the defender's defense, move power, whether it's STAB or not, and type matchups, and it gives me a number instantly. It's self explanatory once you have it. I can just keep hitting fire for a bunch of numbers that I use for my ranges. Since Pokerealm evicted me from the staff, flamed the hell out of me, and eventually banned me, I feel no guilt in giving it to you if you want it even though it's not really mine to hand out.