Randomization of warframes and weapons was already a big negative idea with Duviri, and here you have AND damage mitigation on boss as additional """"""""""challenge""""""""""" is just disgusting. Assassination for elite archimedea should be completely reworked or removed from mission pool for archimedea. There's nothing challenging of getting absolutely the worst loadout and then having to tickle the boss with it for 10 hours, hoping that dead host won't get bored and leave the game, making the mission failed (what happened to me, by the way). Please, either remove randomization (which probably won't happen) - or remove damage mitigation from assassination boss. Maybe add some mini-game in between phases or something, but right now boss is completely unplayable most of the time, especially with modifiers like enemies surrounding him make him stronger, having you to fight with a Stug against a boss and 3000 eximus units flowing around him.
THERE'S NOTHING """""CHALLENGING""""""" OR FUN ABOUT HOPING FOR A LUCKY FLIP OF A COIN FOR YOUR LOADOUT. NEVER WAS, NEVER WILL BE.