It’s hard to believe that a single instance of any synth would consume over half the CPU on my box, even Serum doesn’t do that. I can load dozens of Sylenths, Massives, even a couple Diva’s and they don’t come close to one instance of ANA with the ‘control pluck’ preset. It’s a nice synth but not nearly nice enough to justify the CPU it uses.
She is a little power hungry agreed, but we are very nearly finished version 2 which is much much more efficient. You can try reducing the polyphony on the synth, and try and avoid using the internal reverb, whilst it sounds amazing, it does eat into those CPU cycles.