I'd say add one or two bone walls to be sure you have one when you are ready to kill, and you can do it with less cards and no (or just one) phase shield. The mind flayer is also not that useful.
I often use a very similar deck for FG farming (it's now quasi fully upgraded but worked well unupped - replace the supernovae with more pilars, and the shard with a sanctuary eventually) :
Hover over cards for details, click for permalink
592 5ia 5ro 621 621 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6rn 6u3 6u3 6u3 6u6 717 71b 71b 71b 74b 74b 7am 7am 7do 7do 7k2 7n3 7q5 7q5 7q5 7q9 7q9 7q9 7q9 7t9 80h 8ps
ps : after reflexion your deck is probably better than mine against some gods (more steals and phase shields should allow you to beat Osiris for example, when my version has problems with his catapults and number of creatures) so just keep it