And, because I feel really motivated at the moment here's Balance Commentary part 3. Please excuse any negativity, since I'm mostly mentioning the weaker units. The game won't be any less awesome because of them. So I hope everyone gets to enjoy post 3, featuring:
Assassin - This unit is almost too good. It completely circumvents the frontline AND hits 2 units. The only downside is when it dies, and the enemy backline doesn't. And maybe its low base HP.
Verdict: one of the top units in the game. IF you want to nerf it, maybe give it the Knife Thrower's ability instead.
Poisoner - Another top unit in my opinion. It cleans up the backline squishies safely from the 2nd row. It also doesn't need attack buffs.
Verdict: another top unit. IF you want to nerf it, either reduce its range (that's less of a nerf than it sounds like, I play it in the 1st row a lot) or make it simply hit everyone for 2, without attacking normally.
Monster - Some people say that it's S-tier, I personally think that it's mostly fine. The attack is halved and the targets are random. Other units are somewhat more reliable.
Verdict: I think it's okay, but as a nerf reducing the amount of attacks to 4 is an easy option without a massive impact.
Shadow - An incredibly strong unit. Most of the time, it will oneshot the 3 units in the back. Makes for an amazing carry, more so because the Assassin is similarly amazing.
Verdict: nerfing this directly is really hard. A rework would be a better idea. I'd simply rework the Assassin to be weaker, leaving the Shadow nerfed as a result.
Knife Thrower - On paper, this unit isn't even that bad. You likely kill a Tier3 tank unit and the Knife Thrower needs no investments. In practice, the Assassin is just so much better. Why would you leave the Assassins unbuffed? Either you buff the Assassins and then downgrade them, or you're gathering terribly weak Tier2 units and die before you get the Knife Thrower.
Short Verdict: bad unit, needs rework
Long Verdict: one buff would be to remove the damage to itself, and reduce the bonus damage to say 50 or 100. I'd also swap it with the Monster, since the Monster is a unit that wants buff, just like the Assassin. Meanwhile the Knife Thrower is a unit that DOESN'T want buffs, just like the Poisoner.
There's also another option: this unit is meant to be a counter against strong frontliners. It's whack to gather a counter that's a Tier3 unit, and would have a better find in a Tier2 unit. So one option would be to switch it with the Assassin, or even give it its own unit branch. As a Tier1 unit, it might deal 10 damage to the target and itself. As a Tier2 unit, it might deal an additional 50 damage to the target and itself. Maybe there's a Tier2 variant that deals an extra 20 to the target, but not itself. There's a lot of things that can happen here.
Verdict: there's a niche for this, the buff value should probably be the same as the Armory's though.
Weapon Limbs - This unit doesn't suffer the drawbacks of Living Weapon, because it triggers when shopping. That means that you can reposition your units to specifically get the buff on the target you want.
Verdict: don't think this is like the Living Weapon. This one needs to gain less stats the the Furnace. I repeat: do not buff.
Berserker - You get +8 stats once. That should tell you how bad this unit is.
Verdict: must be buffed. For example, it could temporarily gain +8 attack each time it attacks. Or it could gain +3 attack each round.
Shield Knight - To be better than the Berserker, this unit must be hit 9 times. It's just as bad.
Verdict: must be buffed. For example, it could be immune during the first round of combat, or it could prevent attacks against the backline, taking the damage in their stead.
A Shield? - This unit is hard to rate. It counters certain units in the game, but overall I don't think it's too good. One of the issues is that it's both a front and backline unit (you want it in the backline, to grant its buff as long as possible, but you probably buffed the Shield Knights with lots of HP). This would be a great unit if you know what you'll be fighting against, but so far I consider it bad.
Verdict: must be buffed. I like the "invulnerable during the 1st round" idea here as well. Maybe it could extend it to the entire army. Similar with the taking damage in their stead thing. I think the issue is that most backline targeting units (other than the Fire Mage) just oneshot their targets, and 5 less damage won't help.
Tower Knight - This is the HP equivalent to attacking 2 enemies. So technically speaking that would mean it follows more of a Tier2 curve. It is a fairly strong unit anyway, however I would never get it as its ancestor is just too bad. Offense still reigns supreme.
Verdict: what this unit needs is a buff to the Shield Knight. This also makes me think that maybe the Shield Knight could take half damage and the Tower Knight only 1/3rd? Or possibly both take half damage, but the Shield Knight only from the frontline.
Barbarian - This one is a really cool unit. It is the only unit in the game that deals double damage against the frontline (also a thing that the Berserker could get). It also gets extra attacks against backline attackers.
Verdict: cool unit and in a great place
Ogre - The strongest lategame unit in the game. It obliterates almost every teamcomp with a single attack if it's buffed sufficiently. The only way to win against an Ogre is to have a unit yourself that can solo the Ogre's army. Speaking thusly, it might actually make sense that the Berserker is this weak, simply to balance out the Ogre.
Verdict: this unit is very hard to balance. Honestly speaking, nerfing it will probably leave it weaker than the other multiattack units (unless you do something like reduce the damage to 40% of its attack). Maybe also give it a drawback like taking double damage. Alternatively, it could deal double damage and any excess damage carries over to the next unit.
Final option would be to nerf all multiattack units. In that case, maybe the Ogre would hit the first 3 units. A nerf isn't mandatory either; so far it still requires a lot of investment to get the Ogre rolling and at that point every other teamcomp I got also steamrolled almost everything. Might be best to just see how good it is in the future.