Actually the build-up of 2-3 hours to get to the good stuff could still be applicable as long as there are checkpoints along the way. Why not have it keep track of your successful waves progression as the week goes on. You might play the first day or two for an hour or so and only get to wave 20, get a few decent drops, but if you keep playing throughout the week, you reach wave 50-60 or something like that you're suddenly getting nicer stuff on a regular basis. By the time it hits the weekend for most casuals (when that type of gamer generally plays the most for obvious reasons) it can be a frantic push to burn through a bunch more waves (as you've already gotten pretty far along with an hour or two here or there earlier in the week) to keep those rewards rolling in before it resets you back to wave 1 on Tuesday :) It would also promote playing more, playing longer, and playing more often... which is always what Bungie wants! [spoiler]I'm sure there would be those trying to abuse this and get hooked up with people for a checkpoint at say, wave 50 or something... but then people do the same thing with raids. I mean how many times you see people constantly looking for various raid checkpoints :)[/spoiler]