The Goblin,named after the mischievous entity from folklore,is physically weaker than even basic human Husks. However,it makes up for it in tactical planning,surpassing even a Marauder or Collector. These Reaper units have built-in cloaks that allow them to traverse the battlefield in safety until they can strike their enemies from behind whilst they least expect it. In addition to this deadly ability,Goblins can shoot super-heated plasma at their opponents in a similar fashion to Alliance combat engineers to burn their enemies,as well as drain the kinetic barriers of their enemies to restore their own.
Actually since salerians have a pretty hyper active systems it would stand that your hypothesis would be correct. They'd fight like the husk but likely are way more agile than the husks. Furthermore its likely these types of reapers would be more intelligent than you everyday husk.
I could see the Reapers using these guys to actually do the altering and experimenting on other races. Like, since when a creature is Indoctrinated the Reaper gains control of your mind [and knowledge] they could use all the valuable information Salarians learn to be better at the whole "turning people into horrible monsters" thing. Although, the idea of them acting like Husks is pretty cool too.
I love your artwork's style, but I disagree with this one. Salarians are incredibly quick with their brains, but not on their feet, and very technical. I can see them as moving a little more froglike, running with evolved frog-muscled sprinting legs creating things on the battlefield while using fire, frost and electrical attacks.
Can I make a suggestion on a Salarian variant. That the Salarian have a snipper rifle similar to the Maruder, but on the back are pods that pop up to be those barriers to make. Sort of a cross with a Nemissis and Engineer. Except it can cloak as well.
i got an idea why not call them Goblins have them use slightly enhanced tech powers from a reaper modified omni tool like incinerate and overload perhaps even sabotage and if you get to close it slashes you with an omni blade
If I might make a suggestion: Many salarians in-game used cloaking tech. Make them cloaking melee disablers called Ghosts. They sneak up on you while cloaked, and knock you out of cover, making you a sitting duck for a Ravager.
Well since the salarians are all about the STG... maybe they're like ninjas or something else insanely quick and flexible that's a bitch to land a hit on. You know, like how in dragon age elven darkspawn were shrieks?
In my headcanon brutes are created from turian descended from the Krogan Rebellions veterans that ACTUALLY did the dirty job of adminstering the genophage and certain Krogan that have shown to be compatible with the dextro-amino acid structure of the Turians. The process of creating a brute need to be done carefully so a levo-dextro reaction is not created, though.