Should I Miracle Circulator (cash shop one)?

Class: Cannon
Curret IA Line: 15% Crit (boost me up to 100% crit with DSE)
Current IA Rank: Unique
Aiming IA: Attack Speed

Questions:
1. How likely to rank up with the NX Circulator?
2. Have the IA list changed during unleashed patch?
3. Should I do it?

Thanks!