Looking at your decks, I find the "Ultimate Defense" one very interesting : all three skyelves, Worldbreaker Gun and Church of Negation, even Frenetic Assault... really nice one ! I did see thought that your put the Lost Laucher red aff for T2, a very good card... among others. Frost/shadow have some very good buildings options at T2 and on others situations, the Lost Launcher would have been nice, but you also have access to Cannon Tower, which has more health. Now granted, the Lost Laucher have 2 advantages over the Tower : it has rage and can hit air. However...
1. The rage seem very broken to begin with, since with units like Rageclaws, Giant Slayer and Fire Dragon, it allow them to inflict 4x their normal damage the more they fight. Sadly, buildings don't work that way, and if I remember well, the Lost Launcher only can multiply its attack by 1.5x.
2. You should not worry over the air if you have the Skyelf Templar at T2. In a deck without them, I would see some utility to the Launcher, and they do have better firepower, but to me, the Cannon Tower just seem like a better choice. With the Skyelf, of course.
But hey, why stop to the Cannon Tower, I also really like the Time Vortex ! Sure, it demands much more energy, but the health is of the chart, and even if is attack is not impressive, is firerate increased depending of the void power(more or less with the affinity).
Damn, I really do like to nitpick. Also, no T4 units ? Why ?