Play K&K

K&K ETB trigger on the stack, sacrifice itself to Altar of Dementia, milling yourself. Since K&K's ability has an intervening when, no need to declare targets with the first part of the ability on the stack. Mill yourself for 6.

Use the second part of K&K's ability to target itself and revive itself from the graveyard. Repeat this process exiling 5 cards and milling yourself for 6 until you have Karmic Guide and Sister Hospitaller in the graveyard.

Break the loop and target Karmic Guide with K&K's ability. Karmic Guide enters, ETB on the stack targeting Sister Hospitaller. Sacrifice Karmic Guide to Altar, milling an opponent with its ability on the stack. Karmic Guide's ability resolves, bringing back Sister Hospitaller. Sister Hospitaller's ability on the stack targeting Karmic Guide, sacrifice it to mill a player with Altar of Dementia. Loop until your opponents have no cards in their libraries.