Here's the thing:
Oral only cycles sound great, don't they? You get a nice "mild" steroid like anavar and swallow some handy little pills - no need for any of those scary needles - which burn a little fat, build a little muscle. It'll not put 10lbs of muscle on you, but that's ok. You don't really want to get hyooge anyway.
Thing is, it just doesn't work. Honestly, I have no idea why oral only cycles don't work, but the reality is they just don't.
While you're on your strength'll go up a bit, and you'll probably keep a bit of the extra strength when you stop. You'll look better for sure as var hardens you up nicely, and the pumps you get'll be way better than you've ever had.
But that's about all it'll do. If you think you'll come out of that cycle with any extra muscle mass, you'll be pretty disappointed. It certainly won't be anything particularly significant.
It's the same for things like dbol. Some dudes - I have known some in my time - can actually do pretty well on a dbol only cycle but 99% of people just don't end up with much more than they started with.
If you do decide to use var, then yes, a PCT is absolutely necessary and it has to be a SERM. There's no two ways about this.
Also, because var doesn't aromatise (convert to oestrogen), your E can get a bit too low which isn't very nice. It won't kill you, but it's kind of annoying.
So yeah. I wouldn't bother with anything other than a cycle based on injectables if I were you. Var's a great steroid, but on its own I think it'll just disappoint you.