Yes, it will conflict due to the mod system not supporting multiple mods editing the same files. Though you may be able to get around that by replacing ".../scripts/mods/modpanel.gd" with a copy from the most recent version. Assuming that works, so long as AricsExpansion was applied second it may work. There are some seemingly minor conflicts, but you would need to try to find out. And I'm not certain which version of the game MAD was last updated for.