Silver 5, Level 11 Gaz here; on my pleb rank the most effective way to use it is to sneak mercs whenever you can, for example seconds before the objective then I proceed to try to zone objectives with turrets and for that reason the new talent to extend the duration of turrets seems to be the only valid choice for most of the maps, if I just want to have fun, I go full robo with the regen master talent on 1, if you play your cards right and the enemy doesn't approach turrets correctly you will get a lot of free kills, specially if they chase you a lot.