I'd split the Anavar into twice a day dosing to simplify and maximize your gains. You could take it every 8 hours to match up with the half-life, but recently I have noticed no difference with twice a day dosing even with shorter acting steroids like Dbol.
Anavar is not as toxic as others and my own levels have yet to get too high while taking Anavar. As far as the Liver Protectant - is there such a thing..lol. The products available might do some good and might be a better safe than sorry type product, though personally I have noticed no difference in blood work while taking them, but my diet is pretty darn good, so maybe with a sub-par diet or for 'just-in-case' I'd take them.
By the way, I've ran Prop and Var with excellent results and recommend the cycle. I'd run the var at around .2mg per pound of body weight - no reason to get crazy with dosages, and the Prop at 350-525mg+ per week.