Ok, so I am considering making a Silvally GX deck, and wanted if you though it is worth the time and effort. My reasoning as to why this deck might be good is that post rotation, there will be a drop in field blower from a 2-3 of to a 0-1 of in most deck (no Garbotoxin). With this in mind, pairing Silvally GX with ULP Magearna will allow you to switch types pretty much at will. Also, with the loss of N, it's much easier to keep the memories in your hand than previously.