AG Mixture is okay for the effect of sliming bugs at range, but you may find that Volitile Impact Mixture is better for the damage efficiency in exchange for the slow damage over time. You can potentially kill things faster from spamming normal Sludge Pump shots with that overclock.
As for the Subata's Explosive Reload, you're better off modding it 21133. You can shoot faster and straighter that way and utilize the most shots possible on single targets.