I’m pretty sure, it is still a very valid and strong build. I haven’t done it again after the newest patch but the numbers with the Scyther alone are still OP like.
IMO, the final mission is one of the worst mission in the whole game. I mean the map on its own is really nice but the whole rest feels just not as it should be.
Yeah that mission strikes me as a bit of a middle finger to a LOT of play styles. Before I took a break I remember one of my builds managed to pull off going passed that last archway, but it was brutal. It was pretty amusing with scorpions before they nerfed marked for death though. My son marked it up so much when he ran the mission that his last shot was doing tens of millions as I recall. It was pretty funny.
This game still seems to love sniper rifles and HATE assault rifles. Even with the new marked for death, I ran a mixed squad of sniper/priests, and sniper/infiltrators and the end boss was trivial.