First, let's think about these 4's powers.
Pernida C the Compulsory. His/her ability is similar to long range Kamui, but instead of teleporting objects to Kamui land, C warps them 'inside'.
Askin D the Deathdealing. As far as I understood his abilities, he can make your current amount of blood dangerous for you. But, if you wound yourself to flow some blood out, you'll die from blood loss. Basically a checkmate unless you have Kirinjis water.
Gerard M the Miracle. His powers aren't shown yet, but I guess he can do miracles like defeating much stronger opponents than he normally could. Second option is that his ability is similar to Gremmys but nerfed.
Lille X the X-Axis. He can basically shoot through most things. He claims that x axis clears everything, but that'd be too op. (He could 1 shot anyone but Shikai Shinji/Aizen or Bankai Tousen.
Now, to me it looks like Askin's ability is the haxxest one.
Ill say they are like in this order:
Askin
Gerard
Lille
Pernida