A thing about Bombast's post, Ruin 2 is not your exclusive filler move. Ruin is. Use Ruin 2 when you need to use an off GCD ability like fester or spur or something. Try and fit those in during the GCD from Bio and swiftcasting shadowflare as well. And make sure Garuda is on Obey.

Being a good SMN takes a lot of effort in learning how to play the class the best.