Verngolly is pretty cool. I thought of making a tinkerbell custom with a fairy squad for my wife to play and tinkerbell would of had something similar to your fairy dust but I would have made it so that any figure you control that is adjacent to her gains flying when they start to move away.
Another question about him is his size. Fairies are very small creatures, and his figure, too me, would be bigger then his actual size compared to other figures. So, I would suggest making his hit zone look like a custom that badgermaniac made of
Yellowjacket. and and use the same sizing too (tiny 1)