How "mandatory" is the sniper in an AoD KT?
I'm putting together an angel of death KT themed after the imperial fists (I love their lore and tactics, plus they're fairly easy to paint) so obviously I'm going heavy on the shooting with lots of bolter fire and sharpshooter/siege specialist tactics.
Now that we can take both the heavy bolter and the sniper, am I kinda forced to take both in order to be more competitive? I have nothing against the sniper per se, it's just that it's not something I would normally associate to the imperial fists. Is it that much better than a regular intercessor gunner?
Thanks in advance for the insight