You don't need aghs refresher, that's just masturbatory.
A more normal build for him would be boots -> soul ring -> wand -> (mek or arcanes or drum) then depending on what your team needs vlads, Yasha, pipe, aghs.
Aghs refersher is late late late game. On 50 minutes a support usually has enough for that (even 5's start getting enough by that time). I'd run him as 3 or 4 depending on the rest of your team.