With the Butchering mod? No I can't, the instant drops work now. It didn't work for me yesterday, I did some tests today with same result and uninstalled your mod. Now I installed again and.....it works.
With BetterLoot? Drifters ( I killed about 30 Tainted drifters) drops just usual staff, not the loot added by BL (gear parts, salt, scraps, tin bits). Or I can be extremely unlucky, its probably one of those days for me.

Thank you for your answer and for the mod. With the mod working it will be Drifter killing spree tonight.
Snossoz 

Can you describe the problem with the two mods? Both worked together for me.

If you want to combine the mod with another loot drop mod, you can write the following in the dependencies:

"name of the other mod":"version of the other mod",repeat the previous for any other mod with lower priority

This should overwrite all other relevant patches from other mods.
If you want to give other mods higher priority, you must write "a" in front of the name of this mod in your files so that the mod is above the others.

+1 for the Butchering mod compatibility request! Many Thanks!

I test the mod with BetterLoot and it dosn't seems to add more loot. But I guess you can add easily more loot drops in to .jsons in mod folder: Mods\instantTemporalmobdrops_v1.0.0.zip\assets\instandtemporalmobdrops\patches?
Caveira

But with Butchering mod enabled this mod dosn't work at all. Would be possible to make them work together.
Eather on your side or Butchering mod side? 
Snossoz

Does this works with mods that change their loot drops?