it's about 10 years since SMG is been around and never in this time did i find it usefull . Compared to ATMG sentry is like using a small pistol vs using a machinegun . it makes no sense making a build around it as it has similar results to using normal attack .
it's not like " wow , have you seen SMG? " in a good way . it's more like "have you seen how shity SMG is ? " . then answer is obvious .
also , there isn't any oskill that i haven't tried in all this time . if it works fine , it's in the compilation already . if it's crapy , it's not here .