Not being an electrical guy, admittedly I just took their advise. I think it was Ben who told me. Th basics were that daisy chaining more than 3 units could damage them, the AVR, or both.
A separate conversation elsewhere indicated that too many devices in a chain may create too much draw from the source trigger. Again, not being well versed in this, I can’t elaborate.
Also, the 2200s have an auto-on/music sense feature. It works pretty well and I have found little need to pursue triggering as a solution.