Problem with adding tiers for Mystical Agriculture

So i recently made a mod which adds 3 tiers of essences to Mystical Agriculture. The problem is that i can't find out how to add the tiers themselves, like in mystical customization or in Mystical Agradditions where tier 6 is added. I'm aware that agradditions is made by the agriculture author.

I just want to add the tiers, thats all and maybe if anyone can help me with making tools for the new essences like mystical adaptations did.