Plasma+Oxy fuel machine/ PlasmaC/ Mesa card/THCAD/Parallel port query

Dear friends,

I have planned for a Plasma machine for industrial application. It will be a dual option with plasma and oxy-fuel.

My plan: one Mesa 7i76e or 7i95, one 7i70, one THCAD for ohmic sensing and another one THCAD for arc voltage sensing.

Now Mesa 7i76e and 7i95 are out of stock.

question 1) what are alternative option? if 7i76 with 5i25or 6i25 is used, will it perform same with two THCAD and 7i70?
question 2) if I opt for parallel port, can two THCAD be used successfully?
question 3) with PlasmaC mode2, with some distance sensor and flame sensor, have anyone run a oxyfuel machine?
question 4) I understand 7i76e and 7i95 both are hardware pulse generator having high frequency pulsing capability. Am I right? In addition, 7i76+5i25 or 7i76+6i25 are hardware pulse generator or not? Also what difference I get using 5i25 and 6i25?

Please reply.

Question 5) If 7i92 (ethernet FPGA ) + 7i76 (main board) + 7i70 (expansion board) + THCAD 10+ THCAD5 used, will it work??