The weapon base has a R socket so I put a toxic enhancement in there and poison works well with the good weapon base damage but you can replace the toxic enhancement with an accuracy mod and put in Real-life Fighter somewhere for more damage.
The recoil with the passive still causes it to kick a little even with max recoil reduction mods and there is negligible difference with Action Reaction.
while the buff is active you have 100% crit chance, so hit as many shots as you can in that time frame and if it runs out before you finish then just reload to save ammo. You can almost unload the full clip during the buff.