I literally gave up playing my Mage class playthrough and deleted my Mage class character and world because hilariously enough I couldn't even beat the first mech boss, I guess it could just be a skill issue on my part, but when I'm playing Ranger or Summoner bosses and game progression is a breeze! I even made a Yo-Yo class character and world and still in early Hardmode lol
I still yet to play Calamity, once I get a laptop and money after getting a job I'd probably buy Terraria via PC/Laptop then play Calamity totally head-on and blind lol (I've seen a lot of Calamity playthroughs, but still not knowing the game's progression in the mod it's still considered playing blind).