Usually when i get into uptiers i load some bombs to destroy one base and take 2 Sparrows alongside with 4 Aim-9P’s.
İ use terrain for my advantage until i reach the base then proceeds to find unaware or busy targets in order to engage, usually works fine at uptiers, do keep in mind i play very aggeresively in order to achieve kills at uptier cause if you give them breathing room it will usually end up getting killed by them.
İf im in downtiers i usually equip 4 Sparrows+4 Aim-9P’s, get into high alt and start doing BVR in order get air superiority, after that it just cleaning party.