Fraliens are a little warmer, and fantastic for mechanical users, they have a ribbon wire stack in the middle, replacing that 3rd core.
 
28g frames/6ply .3 ribbon Fraliens
3.5mm ID 5 wraps Approximately:
                                                                     Kanthal:    .16 dual
                                                                     Ni80      :    .13 dual
                                                                      SS          :   .10 dual