Hello there, first since your on DEX, I recommend installing CCAPI (quick way to set CID) them if you want to mod bo2 you gotta have an antiban EBOOT, I do have an antiban eboot that contains all mods.
SPRX and TMAI doesn't really matter, just as long as you have an Antiban eboot for it, SPRX, you'll need to use the eboot that is assign with that SPRX, of course it contains antiban...
People say going to PSNinja and PS3Patch helps prevent ban, but it actually doesn't... I have never used those and I haven't gotten banned.... The main thing is, do not run custom apps in your jb ps3 while online, since you'll get flagged and will get CID banned in the next day or two.
Let me know if you have any more question, plus I'm sure someone can explain it better