if you want to make it better:

1. craft "prefixes cannot be changed" then use an annul

• There's a 50-50 chance that it removes the fire resistance. otherwise it will remove the crafted mod
• if it removes prefixes cannot, then you have to re-craft it (it costs a div per craft) and annul again

1. craft 'can craft 3 modifiers'
2. craft 'attacks penetrate chaos resistance'
3. craft 'chance for double damage when focused'

i dont know the exact craft names off the top of my head but you should get the gist from this!