I am using Quickdraw and Bipod on my Intervention. Quickdraw so if the enemy is close I can quickscope them easier and bipod because on some maps there is a long path from your spawn to theirs so you can prone and you will recover from holding your breath faster.
I am currently running with a Katana as my secondary weapon so if my sniper fails at close range I can switch and zig-zag up to my opponent (assisted by Lightweight and Marathon)and 1 shot them.