I purposely did not install Calamity because I wanted this mod to be meaningful. However, Thorium's Ragnarok armor is also better and obtained earlier and easier than Asthralite armor.
While Asthralite Armor has more defense, the damage stats are very low in comparison. While wearing Asthralite Riftbow with Asthralite Armor I do about 15k DPS. Equip the Assassin's set from thorium's Ragnarok boss and I do 35k DPS. All testing done with no accessories, normal arrows, and a single target dummy.
I understand you'd prefer people to only use stuff from this mod, but this mod doesn't have as much pre-ML content. I feel this mod would be amazing if you balanced the last couple bosses/gear to be a straight upgrades to Thorium's endgame gear so we can get the best of both worlds. Perhaps add more damage bonuses on the armor, and increase boss health to compensate?