Yes, I use a BigSky in the FX loop. I want really lush and thick and sometimes "weird" reverbs, and there are 2 things I didn't want to deal with... 1) Configuring tricky combinations of multi-delay et al to achieve that, and 2) worrying about hitting CPU, as I sometimes also have pitch, 1 or 2 drives, 1 or 2 delays - and I ALWAYS want to use the best possible resolution on the Cab block, and I want it to be stereo. I just just don't want to think about CPU at all, and BigSky solves that.I used an H9 max (in the loop) with my AX8 when I first started using the latter. In the end I found I didn't need the H9 all that much. As much as I like the H9.
Did any of you do anything in particular with the extra CPU availability on the AX8 when using an H9 and/or a BIg Sky to handle certain other CPU intensive tasks? Just curious. I felt like I was under utilizing one device or the other most of the time. One of the main reasons I stopped using my H9 was I seemed to be able to get all I needed from a few AX8 presets. My needs are probably on the simpler side of what is possible, but my main presets use about 13 or 14 blocks typically. Each preset can cover a lot of ground.
For setting up good I/O levels w H9, I do remember using the H9 app for dialing that in. It didn't give me a lot of trouble, but that may have had to do with my AX8 presets at the time.
Could I get along without it? Probably. But I don't have time.