Ok, well subject to all my previous caveats, I'd say start w/ 5 mg ED of anavar. Make sure you know how dosed it is (i.e. under or over dosed, for ex papervar tends to be overdosed, some others tend to be over dosed.) YOu can usually tell that if she starts breaking out w/ acne right away. Any response should kick in w/in 1.5 -2 weeks.
Takign it -- best to get tabs instead of caps if u can. Gives you more ability to split them. Take whatever is your daily total dose & split it between am & pm - var has about an 8 hr 1/2 life -- keeps the body's response to it even as opposed to a big fat spike one time / day.
Run that for like 2-3 weeks, see how it goes along w diet & training. Should notice stronger lifts, faster recovery. Possibly some acne. THen up it to 10 mg. Same thing - split the dose & run it for a couple weeks & see how that goes. Really no reason to go above that. Run the total cycle for say 12 weeks. She can expect to lose her menstrual cycle within that 1st month & it will either be sporadic or gone for the duration + probably 1-2 month after. A note about birth control -- there is no interaction betweem it & AAS but the two hormones will tend to be trying to do opposite things. Birth control , controlled doses of estrogen & progesterone, will want to encourage estrogen-pattern fat depositing while AAS will want to encourage leaning out. That's why most competitors stop takign b/c while they are cycling. It just gets in the way of trying to really cut up for a show. But even if she decides to stay on (if she's on it), just expect that her menstrual cycle will be interrupted & shoudl probably fall back on to a back up method of birth control (i.e. condoms) for that period fo time.
Creatine tends to work synergystically w/ var - she might be interested in trying soemthign like AF Store's PureCEE along w/ it. I'd also suggest running w/ some good anti-oxidants to help keep the work the body has to do to shuttle out waste like free-radicals to a minimum. No drinking during the cycle, clean diet, train like a mofo & sleep well!
That would be my recommendation if she chooses to go that route. And have her go do her own research on var. There's lots of stuff on the internet. Each girl's response is different - could be acne, bloody nose, no menstrual cycle, etc. Var is fairly reliable but each person is different. (Assuming you know your source...)