Hey
Have you updated to version 2.5.8 as the updates just swishes out from ReFX team
The 2.5.7 crashes a few times but not the new 2.5.8.
We have two songs we are producing now with 17 Nexus2 instances on each and PTHD11 runs like a GOD. We are gonna bouce them to wav as soon as we lock on to the sounds but 17 Nexus2 on one session is remarkable on 512 buffer settings. We also have atleast 6 Phalanxes and several others like ElectraX and NI stuff so try updating and see if that helps anything. Also don't forget to download the new "Christmas" exp as it contains 64 new sounds and presets that has nothing to do with Christmas
And The MASTER KEY before importing the new expansion pack.
Best Regards
Chris