Random.

PS - you've got some absolute all-stars in your list. Nekmo is probably one of the best Hydra champs in the game. Goffred, Sicia, Ragash, and Samson all have quite a lot of value too. Even Annie has some cool uses. Just about the only one of our legos who doesn't have value is Narma.

Random . i did crohnam and my own account and i had the same thing as you with epics , getting all the free ones , doom tower ones , etc :P 

Havent pulled any previous fusion beside Dreng so far (not 100% sure cuz idk all the past fusions)

You're misremembering. DT epics can't be pulled from shards.

probably got them mixed up with login epics , ty for correcting ^^

Definitely random.  That said at this point if you combine Past Fusions and Guranteeds I wouldn't be surprised if it's better than 40% of the available pool.  So nothing nefarious, just the odds of it.

easily 70+ guaranteed and fusions by now, I think. so somewhere in that 35-40% range most likely. 

Little Miss Annie can be an absolute beast in the arena, one-shotting tanking HP monsters.

I've got loads of fusion champs too. But there are so many of them that it feels like they're all over the place 😁 Btw. why did you ask the question on Reddit? https://www.reddit.com/r/RaidShadowLegends/comments/13j88lv/past_fusions_and_guaranteeds_increased_666_pull_rates/