the beginner guide recommendation is very very very general and basic and does not take into account a whole host of other factors.
its basically like giving diet advice in such a general way that you say to eat protein, fats, and carbs. ok , thats great but how can I actually build a successful diet around that. sure its a start, but its in no way a dialed in protocol.

the last thing you want to do is start taking test and then take too much AI for you. your test levels will begin going up as your E levels start going down (not good) this is completely un-natural and not how the body was designed to work. as test levels go up E levels go up as well. this is what is supposed to happen. what we want is to make sure E levels do not get out of control. if they get to that range then we can use an AI to keep it in check. getting blood work at 6 weeks and judging things based on how you feel is way better then simply taking an AI for the hell of it from the start of your cycle.
This is my belief.. others may say to just take the AI and play it safe. but thats not really "safe". from my experience more guys run into problems when they start an AI from day one, then they do when they instead wait for blood work and proceed from there.

is this your first cycle ?
if so, then just hold onto the VAR. your going to grow like a weed off of the Test (and elevated levels of estrogen) and won't need the VAR, in fact you won't even feel or notice what the VAR is doing if you take it on a first cycle.