Lich is being a bitch

I might be stupid but just bear with me.

I have learned all three of the lich mods i need to kill my lich but obviously not the order. So I put the mimic one first, then the other two in a random order. I got the first one right bc of the mimic, then the second. So I'm like "the next one has to be right it's the only one left" but it was wrong. How?