I have a Mogis deck too. I think I kill myself about 1/4 of the time. I still have a lot of fun with it though; i just go in with mindset for that deck that the goal isn’t necesarrily to win, but to sow chaos. My personal goal is to end the game in a tie by killing everyone (including myself) in the same turn.
Not LOTR, but I am currently working on a The Mimeoplasm self-mill deck. Main goal is to get creatures with evasive or potective abilities (shadow, protection, fear, indestructible, etc.) and a creature with decent power to make The mimeoplasm come out as the nastiest beater possible. Alt win-con is going to be Thassa’s Oracle since I’m so heavily milling myself anyway. There’s some reanimation in there just to get cards back from the graveyard I might need for the game, but that’s the not the real purpose of it.
Lemmiwinks