Making a Wither Farm with few mods ?



Hello !
I'm actually playing with friends on a custom modpack with few mods and as I've got Draconic Evolution, I wanted to discover the mod.... I realized that I needed a Wither Farm in order to get Nether Stars, but after seeing the farms that people were making, I realized I couldn't do any of them because of the lack of certain mods in my modpack....
Would you mind thinking with me of an automated Wither farm working with my mods, I would be really grateful !
-Draconic Evolution
-Draconic Additions
-Grimoire Of Gaia
-Ice And Fire
-Immersive Engineering
-Thaumic Periphery
-Thaumic Wonders

PS : I'm in 1.12.2