lol I'd be here all day if I didn't control my time spent on it but just a few I noticed in earth alone would be...
failed summoner 8.3 (DIAMOND) - way too low, the strengthen is a must at lvl 10 in the low mana meta because epona (strengthen) and Doctor Blight (weaken) is huge with queen Mycelia (amplify) magic reflect mirror match.
Khmer Princess (Silver) 6.5 is way too low, 2 mana tank heal literally doesn't exist other than this card and is one of the only ways to beat llama flesh golem at 13 mana and llama kron at 17 mana.
Unicorn Mustang (Bronze 6.7) and (Gold 6.3) is too low and the (Diamond 6.4) is probably too high. Bronze because nothing does any damage so a lot of magic cards literally can't hurt it with one silence from say mushroom seer and in gold when it first gets magic reflect it's pretty game changing. In diamond it falls off and it's basically always better to play Almo or Mycelic Infantry, especially since Immortalis starts to replace Mylor and the void is unnecessary.
Beatrix Ironhand - (Bronze 5.6) This should be a full point higher, 6 mana, 3 archery damage, close range is very good in bronze where damage is hard to come by and she fits perfectly into the mylor / mustang anti magic / anti melee meta as a strong archery card.
Mitica Headhunter - (Bronze 5.9) Could also be higher for most of the same reasons as Beatrix, 4 archery is fairly substantial in bronze.
Epona (Diamond 8.7) not sure how you get repair and go down in rating from your gold rank but this is probably just a straight 10 for me if a 10 rating is even possible lol.
Runemancer florre (Gold 6.9 and Diamond 6.3) this is simply too low, she is a great way to spend excess mana while not doing the dreaded 5 damage given you may face a slipspawn in a mirror match. She's a must have in the wands out ruleset as a way to bring archery damage and strong synergy with immortalis in that her magic attack goes first and breaks any armor paving the way for her archery attack.
alright I'm stopping there!
This is an awesome list. I will review the algorithm this weekend and do some tunings. I'll take all of these into account when looking into it. Thanks!