The magus is possibly one of the best chinese branded mono amps. Its only good for spl setups though. Run it parallel next to a branded mono and you will hear the difference. Still, its never siezed to impress when powering the numerous spl setups here on pw including a L7 15" and a 4 12" sub wall setup. I powered my Type R 15" with it and it was great. However, my aim was a spl setup with that build and I never got near that with the magus. Never broke a sweat even at ~750RMS. For 14k, its a great mono tbh.
Since you have 2 d4's, run the subs parallel for a 1ohm load. Magus claims 1500RMS @1ohm, thats not even close to the tested values (~1200RMS @1ohm). The champion series subs can take 500-550 rms so the magus is a great option. As long as your signal to the subs isn't clipped, you won't burn them out.