Heroic weapon choice

Hello,

I’ve recent got back into this game after a while away. I have enough accolades for a heroic weapon but not sure which is the best pick. I’m not that good and can’t complete the weekly’s each week so would take some time to build back up to get another. My main is a bulwark prestige 2 and I’m currently levelling tech marine. Based off this what is my best pick? I was thinking of salamander sword before I started on tech marine

Thanks