Incendiary Omni-Blade - The Quarian Marksman Soldier strikes with an omni-blade charged with incendiary energy.
Combat Leap - The Quarian Marksman Soldier jumps out of the way incoming attacks.
The Quarian Marksman is a class capable of dealing a lot of damage in few seconds while rendering enemies defenseless. Combining the increased accuracy and rate of fire of Marksman with the stacking damage bonus of Tactical Scan and Sabotage (if evolved to do so), the Quarian Marksman is especially useful for taking down large enemies like Atlases, Banshees and Praetorians.
Because cooldowns remain important to this class, weight should be an important factor in weapon selection.
Sabotage remains a highly situational skill; it is useful against Cerberus and geth, but less useful against Reaper or Collector forces. Sabotage may not be worth investing all 21 points into because it competes with Marksman and Tactical Scan for cooldown time and because it remains a situational power.
The Tactical Scan, Marksman, and Quarian Defender powers all have evolutions which increase weapon damage-per-second and headshot damage. High-accuracy rifles, shotguns equipped with the Smart Choke mod, and heavy pistols with the Cranial Trauma System mod are recommended for a Quarian Marksman who specializes in headshots.
Tactical Scan can be evolved to provide a maximum of 32.5% extra power damage against enemies, and Sabotage's Rank 6 Tech Vulnerability evolution increases tech damage against a target by 50%. Combined, these two debuffs allow squadmates focused on tech powers to inflict devastating damage against strong targets.
The Quarian Marksman has 100 less shields than the other quarian classes so he is a little bit more flimsy. To compensate, an update was put in to increase the damage they can potentially inflict. When all weapon upgrades to damage are obtained, a 30% damage boost is given to weapons, where other Quarians would only gain a 22.5% damage increase.
The Level 6 Area Scan evolution of Tactical Scan is very useful for revealing enemies through smoke.
Sabotage can hack Atlases and Turrets.
Tactical Scan, combined with Marksman, can make short work of heavy enemies such as Brutes and Banshees.
Sabotage can hack geth units, but its long cooldown limits power usage. However, it is useful to delay the actions of dangerous enemies with deadly ranged attacks such as Geth Rocket Troopers, Geth Bombers and Geth Primes.
Tactical Scan, combined with Marksman, can make short work of heavy enemies such as Scions and Praetorians.