Treants, I find it somewhat weird that treants are more expensive than treelords.
Even with a small decrise in price they will still not be used as nature gems are very precious.
So maybe split their cost into another path, say earth. 20N and 20E for a treant?
Now Zmey, I personally find them unusable. First time I summoned one I didn't even notice the extra forms as it died in a single turn against Jotun militia and a few non commander banes. They might be worth occasionally as anti SC if you place horned helmets, burning pearl, a strength item and a stone bird. But I don't know, I've still had mine lose to simple PD.
Shinyas, I changed my mind about those after I got my ars whooped a few times. They seem to fair well as anti thuggish, SC's types, but lack item slots, or is it sloths?:P, to make them widely usable, durable.
Ember Lords, heh, great. As Amhazir said you just need some elemental resistances, reinvig and regeneration (which is manageable) and they can hardly get killed.
Cyclops, I think they're nice, good HP, good prot, can self reinvigorate to eliminate that start fatigue. Can be used for magic and for fighting. Decent for the price. They're pretty much the same as the Cyclops pretender.
Asynjas, I love those. I love anything you can thug out, teleport and sneak around! If I played Cealum and go as far as making one an assassin. An SC assassin, now that would be nice, wasteful, but nice
And every once in a while you'll hit a good cross path. In any case they're good for the price, and if you're too late for ERoys.
Firebird, never summoned one, never think I will. Too fragile and can't really be used as a caster I think. Maybe a slight boost in fire or a bonus of sort?
Wendigo, pretty nice if you can afford to wait around. Can do the fighting and the spell casting too.
Grendelkin, hmm, boxers! Giving them anything but the gloves of the gladiator is a crime! They're excellent at supporting armies and killing almost any kind of SC, but I wouldn't risk them by sending them out alone. They do have good protection, and HP, and you can even boost their MR very high, but elemental damage will still kill them instantly.
Ettin, crap. Too expensive and unusable in any situation. You can't thug them out, they'll die to just about anything even with full armor, very low MR, just really bad...
Roc, never used one, Wall Shaker/Horn or something like that is still cheaper. Doe the cloud trapezing part is nice.
Kraken, they're a bit hard with being an underwater summon and all, and still you need to place amulet of the fish if you want them on land, which leaves only the head and one misc left I think? They are hard to use in battle, can't reinvigorate themselves as they only have E1, and you can't place a booster, no bloodstones anymore. You have W3 but can't cast even quickness due to fatigue, and B1 gives you nothing, both for fighting or for spell casting, just an expensive blood hunter. I guess a reverse communion can be used on a Kraken with them having B1, but you need to drag along mages and blood slaves, and I think the blood communion has very high fatigue right? Which would make it unusable even with a communion other than as a very expensive spell caster.
They can't even be used as potent battle mages as W3 doesn't give you much.
I can only see them being used in water with a water bracelet, water power and casting shark attack and stuff.
Mehanical giant, no opinion, never used one.