Cover Fire and Vines would be nice combined, and Arrow Rip + Mortal Reminder would work a little nicer than Mortal + lunging, that way the dot can tick longer and wont screw with the root duration.
Shocking Thrust also could be consolidated to maybe ember strike or something, I rarely can work both of them into a rotation.
I'm really hesitant about changing any ranged CA's tho, IMO there arent enough of em as it is. But Amazing Shot + Devitalizing would be the only 2 I could see combining. The damage on either one is just so low for their reuse time.
Focus aim is just fine too, I love it as it is. (except that it waits till its done to count down its reuse

).