Both mods seem to be interact through the renderPlayer code causing MM to refuse to work (although gracefully fail instead of crash the client)
[03:56:45] [Client thread/ERROR] [FML/]: 7: ASM: Tamaized.Voidcraft.voidicInfusion.client.RenderVoidicInfusion@3ab3b1fe renderPlayer(Lnet/minecraftforge/client/event/RenderPlayerEvent$Pre;)V
[03:56:45] [Client thread/ERROR] [menumobs/]: Main menu mob rendering encountered a serious error and has been disabled for the remainder of this session.
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: net.minecraft.util.ReportedException: Rendering entity in world
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at net.minecraft.client.renderer.entity.RenderManager.func_188391_a(RenderManager.java:408)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at superbas11.menumobs.client.util.EntityUtils.drawEntityOnScreen(EntityUtils.java:175)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at superbas11.menumobs.MainMenuRenderTicker.onTick(MainMenuRenderTicker.java:444)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_610_MainMenuRenderTicker_onTick_RenderTickEvent.invoke(.dynamic)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:168)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at net.minecraftforge.fml.common.FMLCommonHandler.onRenderTickStart(FMLCommonHandler.java:350)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1074)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:371)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at net.minecraft.client.main.Main.main(SourceFile:124)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at java.lang.reflect.Method.invoke(Unknown Source)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
[03:56:45] [Client thread/INFO] [STDERR/]: [superbas11.menumobs.MainMenuRenderTicker:onTick:460]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)