Strix can easly destroy ghroks totem by simply one shoting it , and remove healing 4 enemy that now you can easly harrash ghrokh and others characters that needed that heal
Strix can easly go 4 headshots on inara cause she is very slow but smart Inara can block his sight by using impasse and get dmg reduction from her abilieties (Strix can destroy wardens field totem but not Earthen guard which is applied on Inara)
when you see trix shooting towards you and getting invicible try to shoot him(and make him vicible again after 500dmg)spray/shoot/splash dmg near the place he just turned his stealth on
Strix invisibility is good and gives him advance agnist any flankers trying to kill him but if you are playing as flanker take illuminate and take care of him easly when he cant hide from you