Had a Leylines game against Titania 2 yesterday that ended in a close draw. I think I would lose the rematch though. I was able to Ice Pillar off Killjoy for most of the game (only a part of that was Creeping Ice, mostly just Silent One goodness) and in the post-game discussion my opponent regretted hiring him into this matchup and will take the Emissary in future. I'll post the lists and then talk about the Summons and after that the new models/Title.
This was my list:
Rasputina, Abominable - 10SS Cache
Envy with Diesel Engine
Silent One with Magical Training
Blessed of December
Kaldgeist x 3
Titania, Autumn Queen - 2SS Cache
Autumn Knight x 2, both with the Killjoy upgrade
Changeling with Ancient Pact
This list was very strong despite Killjoy making only 1AP of attacks against a Kaldgeist (which lived) over the entire game. My opponent was able to draw 6 additional cards every turn using Titania + the Changeling copying Titania which is very potent. On to what I learned.
I think the worst summon in general is the December Acolyte, even if you have the card. Summoning one up the board on turn 1 before crews engage has some justification, especially if you can Tools for the Job the summon card back to your hand without your opponent interrupting you. The Ice Pillars being cover just kills this model, and while the Armour +1 helps, it does nothing to fix the models role in the crew. I am still desperately hoping that I've somehow misunderstood the Cryosleep ability and that by treating an Ice Pillar as a Corpse Marker you can also stop treating it as an Ice Pillar temporarily (problematically, this would allow you to walk on it), but as far as I know that is not the case. More on that later as it also hurts Rasputina.
Silent Ones as always are excellent. I summoned one on turn 3 and it was immediately able to start dropping pillars or healing as needed, and with Armour +1 and being able to target through Ice Mirror it is very hard to remove.
I summoned an Ice Dancer on turn 4 that may have been able to help me score the Strat that turn, and definitely would have helped the next turn. Butterfly Jump, Armour +1, and easy healing is a good combo. These are definitely good summons sometimes due to the ease of leaving engagements and the synergy with Kaldgeists.
Finally, I summoned a Hoarcat on turn 1 because my highest card was a 9. I severely underrated these as summons purely due to how effective Manipulative is when you can place the model up the board unactivated. These guys with Armour +1 are amazing tar pits, and the range you can summon them is amazing. On turn 1 I was able to summon one engaged with two Autumn Knights (both had already activated, but Titania hadn't so this blocked her free movement aura) which delayed my opponents entire game plan. My opponent went with Titania and used her, plus a triggered attack from an Autumn Knight, to deal four damage to it after Armour and move it out of Engagement with one of the Knights. Then it went at the end of the turn walked back into engagement (it was still Engaged with one so couldn't charge) and ate an Ice Pillar to heal up 2 ready for next turn with Manipulative back up. Later in the game when I summoned a December Acolyte I sent it in to do a similar tar pit role (as I couldn't shoot ANYTHING with all the Concealing Markers + all the Cover my markers provided) and it just folded.
They are amazing. I strongly recommend keeping one back in your crew to stack shielded on your backline when necessary. Otherwise, a pair of these make for excellent schemers surprisingly while also acting as forward nodes. Their Jagged Ice action is quite good when you're just trying to annoy models that you've pinned down on the other side of a wall of Ice with Silent Ones or Raspy. The only problem I have with them is that Frostbite actually has very little synergy with the rest of the crew as it has very little synergy with the Mutilate trigger, which is how most of the crew gives Slow. Mutilate checks if they have Slow already and only tries to apply it if they don't, which means this aura is still bad even now that you have it on a minion that is actually good, with the mobility to get it near enemies and good ways to give out Slow.
Abominable Rasputina is way better than Raspy1. But like Raspy1 I found her shockwave to be the only good attack action she has. She also has the Summon, which is very, very good, but I'm just talking about the attacks here. I copied Fissure of Frost almost every turn with the Wendigo just for the extra Pillar, the range, and the chance of card draw, and it's what i had the most success with on Raspy's turns as well. The other attacks have a few problems that work against them, but they aren't competing for AP with Fissure of Frost so it is more a disappointment or personal gripe about how this version of Raspy is similarly Shockwave focused in the end.
The problems with Northern Winds are that it doesn't ignore Friendly Fire, and that the damage will usually be at an extra negative on an already terrible spread due to cover from Ice Pillars unless you want to discard a card for every trigger due to Ice Mirror (which still sucks).
Cold Snap is decent but it has some problems as well. The good parts, you can use it on a charge (which will probably give a Shielded due to Ice in the Veins) and the Rift of Snow trigger can get you out of engagement. The bad part is that it's range 1" and you never want to put your Ice Pillars within 1" of your enemy as that saves them an AP to remove it. The Rift of Snow trigger helps if you can land it, but it still might be a better option to just Create the Pillar 2" away and not attack with the melee, thereby guaranteeing that your enemy will have to spend an extra AP to remove the pillar. Still a good attack, just not the focus of her offensive combat like I'd hoped. If they release a Focus spamming model in the Arcanist starter box this attack gets way better.
Overall what this crew is missing is card draw, and a way for the crew to ignore Ice Pillars. If Cryosleep was intended to do that and they FAQ it I will be very happy with the crew. If Hoarcats, Ice Dancers, and December Acolytes (along with Ice Gamin, Snow Storm, and maybe a Laugh Off equivalent ability while touching an Ice Pillar for the Ice Golem) are buffed for Raspy1 then that could also bring up the crew and fix the most egregious Ice Pillar problem (which is definitely December Acolytes).