What feature are you requesting?

If Supplementaries is installed, make Endermen drop their version of the head.

Reason

Supplementaries' version of the head only drops from creeper explosions. It also has a bonus function: emitting a redstone signal when looked at. It even opens it's mouth then.
Having this mods version be replaced by the one of Supplementaries would be nice.
1 - That one has a bonus feature
2 - Having the same head twice in a modpack is confusing for players

Another feature of the Supplementaries version of the head is the filter. When wearing, it adds the Enderman spectate filter.

Interactions with other mods haven't been a priority yet as this mod is still in early phases of development. As different players will have different preferences on how to handle conflicting head drops, I will probably implement a configurable solution.
The next major update is going to add numerous effects to all mob heads, but it will probably be possible to make the head from another mod receive those as well.

Alright, sounds great. Thanks!