I don't think 50 is that hard to get through. I do it every day. If you want to do it faster just use them on lower lvl. 50 is good because it allows for variety of playable toons to try and if a few troopers miss a day 75 points won't kill you. But if you had a smaller number worth a higher value say 40 points then you are loosing 120 points.

I agree that after the update it takes allot longer to go through 50 troopers but it is still doable.