You'll want to wire the two subs for a final load of 2 ohms shown to the amp (as your options with two dual 2-ohm subs on a monoblock will be either 0.5 ohms, 2 ohms, or 8 ohms)
Wiring them for 8 ohms would be a waste. Wiring them for a 1/2 ohm may not be too good of an idea as I don't think that eXcelon is stable that low. Wiring them for 2 ohms will give each sub a hair under 460 watts at 14.4 volts. As those T1's are rated for 600 watts RMS that ought to bring 'em to life pretty well.