Using hard synth to control Halion

I want to use a HydraSynth as a synth AND as a controller for VST synths like Halion. Is there anyhthing I should know to get me started? Hydra has Macro buttons that have midi cc options and extra ones can be assigned to VST instrument things…I would also like to get the Hydra to control mods on Avenger if possible. What do you know…?


Use Quick Controls in Cubase, please.