1. He tanked Gajeel's attacks with his MCB body. It was one of things he gloated about.
Actually he did tank a few hits from base Gajeel before he started using his MBP body (He only used MBP's to get off of the iron poles):
As for the barrage of punches by DF Gajeel, Bradman literally couldn't mitigate the attacks via his MBP body, he literally says it.
2. Calamity doesn't increase speed it gives him control of the weather to create natural phenomenon such as earthquakes and tornadoes. And strengthening only works for a solid body and Bradman likes to rely on his MCB body. Absorption curse didn't work when he was getting his butt kicked by Gajeel....
The Calamity curse can be used to increase speed, Tempesta showed this in his fight with Laxus when he wrapped tornadoes around his body to make him go faster. As for Enhancement, he could just enhance specific parts of his body while keeping the non-enhanced bits in MBP body mode.
Absorption didn't work because Gajeel was only punching him, Absorption only steals the souls of magical attacks, it would have been pretty much impossible for Bradman to use Absorption to stop him.
Ice DeS is a curse then Mira is able to counteract bcs she has immunity to hax Curses. He said he got the curses of the 9D then proceeded to use Curses so his Ice DeS was indeed Curses. Jackal's bombs did nothing to Levy I highly doubt they'll do anything to Mira....
Why would his dialog mean that his Ice Devil Slaying
magic is a curse? He's hardly going to say "The power of the 9 Demon Gates bursting forth from the Underworld! Curse and Magic Power!" is he? Even then, what else hints at it being a Curse? He's flat out stated by Gajeel to have some Magic Power, it's just not as impressive as the other Spriggan's Magic Power. Also, where has it been stated/shown that Mira is immune to hax curses?
Sigh... Levy. First of all there was
clearly plot armour for her in that fight given that she has absolutely no place being up against an S12 member, I remain on that stance. Second of all, Bradman only used the Bomb curse once, had he spammed it I think it's fair to say that Levy would have ended up in much worse shape (Jackal full on spammed his Bomb curse against Natsu). Using Levy to lowball Bradman has no merit IMO, she was practically dying at the end of the chapter and that was with someone on her team taking most of the attacks for her, had Bradman spammed his curses properly or had Gajeel not been there she would have been eliminated quickly.
Besides I never claimed that Bradman would only need to Bomb Curse to beat Mira, I only said that it would be useful if she gets any hits on him due to how the Bomb Curse works. If I had to list what he'd use against Mira it would be:
- Tenchi Kamei (Movement restriction)
- Ice Devil Slaying magic (Obvious reasons)
- Sensation Curse (To rip away her senses and enhance her pain)
- The Second and Third Seals (Movement restriction + Life drain)
- Enhancement (To become stronger as the fight goes on)
- Calamity (To enhance his speed)
The other curses would be useful but these are the main ones I see him using.