It is better than garbage. It is very costly to level up though. I think you can slap 20 SR1s into it eventually and it'll be fairly good. Then finish it up later, it's not like you can realistically get SSRs to max in one go. 20 SR1s when doing AQ3s will take a long, long time though~

By the way, the droprate of SSRs is probably the same in AQ3 and AQ4. AQ4 just gives you about +2 Ns, +2 Rs and +1 SR.