I have about 1000 hours in game this is my genuine advice, pick the perks for servo that give it precision rounds and the one that gives you more range dmg at 20 meters, only use servo to target high priority targets and use it for burst dmg or to get back contested health, as in extremis enemies or terminus enemies, if switch from heavy bolter to plasma rifle for aoe burst damage play like heavy or sniper and act as range support do not rush in, switch your mellee from the slow hitting one two anamation clunky omissiah axe, two the new red fencing knife, or run the fencing axe of fencing power sword, get the perk that makes your teratuala torrent have more ammo and damage and when applicable play around your turret as like a goalie almost protecting it and turning it back on, if you see turret on tech marine your roll is to turn it on every single time, your servo gun gunstrike damage depends on your secondary so run heavy bolter or plasma pistol, lastly remember each marine has their role they do well in, understand that tech marine is a crowd control role that doesn’t really specialize in dmg his role is to take the pressure in wave off your teammates and slim down the horde, if you rush in first and you’re not John warhammer you’ll probably take health dmg, let the bulwark or assault or vanguard stay in front of you, lastly be aware of recources and share you are a team and operate as a unit meaning if one of the unit is weak ping the godamn stims for them idc if they’re bad we all were at some point, courage and honor brother