An FSA 46/30 crank with 11-36 cassette is what I ran on my last bike. 46/11 is a pretty big gear. But you should also be able to go with a 48/30 setup even though that is above what they spec.
Your current FSA crank takes an FSA 90 BCD inner (which bolts to the big ring) and it looks like 30 tooth rings are available. Just be sure that the hole pattern matches - they are unfortunately are not all the same.