Is Rabadon better bought as the last item of a build?
So I've been thinkning,cause the passive says 35% aditional AP and I kinda don't understand what that means.Is it 35% of total AP including Rabadon's 120 or just the AP besides that,and if that is the case shouldn't it be bought as the last item?Cause let's say you are 120 AP then get the item so the passive gives you only 40 AP or so,but if you are 400 AP the passive would double the items ape cause he has 120 and 35% out off 400 is 140 sou you would get 660 AP.I am asking that because it's kinda unclear to me how the passive works.So if you are 400 AP and the item gives you 120 Ap you have 520 AP if the passive gets 35% out of 520 AP you would fastly get to 700.
before
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shield which gets stronger with AP but doesn't benefit from magic pen since it doesn't deal damage