Skullspawner: Glaycion, KoS, Bloodhammer = weak against entangle & skull reduction (unless paired with cleanser and enrage or stun respectively), might also risk killing yourself. Will think they are A tier.
Also, Krystenex can be A tier: summon (in case you need), enchant (so casting is fast), skull reduction, good damage (not as good as YG or mythic)
Sol’Zara ain’t too bad given that it can generate souls…but trashier than TDS
Think you overestimate Crimson Bat…I’ll put it B tier.
Kraken deserves A tier with its devour. Powerful when you can get it looping.
Mab deserves an S tier until there’s a mythic with full freeze trait. Also the damage is high with arcane so long you can loop it. Weak against mana burn immunity. But enemy cannot loop against you easily.
Frostcrown can get very powerful when looped with full giant team (the last trait of magic boost is necessary) - I’ll put it in B tier (A if you use with Jarl & Fire giant).
Leviathan with the knock back can be good against team formation…can be put in 2nd last tier.
Emperor Liang deserves A tier. I ever once lost to a deck with Bard, Emperor Liang and sth else because the healing was pushing health beyond 500 (my Infernus and Mab can’t damage it as fast it heals even though I ain’t dying either)
Starflower transform chance is decent to put it in 2nd last tier.
Lust is still useful against attack based decks. B or C tier is ok.
Orion is trash enough to put on last tier.
Behemoth 2nd last tier. Board movement.
I’m currently lvl 500+ (have majority of legendaries but mythics are fewer than my fingers) I have more comments but can’t type easily on phone.