I would have thought it's:
- LRL
- Sylvaneth
- DoK
- IDK
- Everything else
Given that in 2nd Edition they managed to sneak in a second character model for Sylvaneth in Broken Realms, and now in Third they've given them an even bigger release, while DoK they have only given unnamed hero models to (though make up for it with broken rules - I will never play anyone who fields both versions of Morathi at the same time because that rule is just BS) and Idoneth at the bottom of the Elf hierarchy because GW didn't bother to update them in 2nd Edition and only gave them a single hero in Third.
To be more accurate the hierarchy is probably as follows:
- Lumineth, Vampires, Stormcast and Slaanesh (Get a model a minute, get OP rules, portrayed as far stronger than they actually are in lore)
- Sylvaneth, Warriors of Chaos, the other three Chaos God factions (Get a lot of favour with new models and/or strong rules, but not as much as their golden children)
- DoK, anything else in Death, Cities of Skubmar (Frequently get strong rules but not much in the way of new models)
- Destruction, Anything Dwarven
(Either give them solid rules but next to nothing in the model department or, if they're in a particularly mean mood or have given them multiple models, rules that quickly suffer from powercreep)
- Cool ex-Fantasy factions (Lizardmen, Beastmen, Skaven e.t.c) (Often trashes them in lore, rarely gives them a good solid Battletome and/or tries to actively avoid giving them new models)