RJ is impossible
you'll need 2 rj's, one to get on the platform and one from the platfrom back and that's really hard since rocket jumping that distance gives you 1 mm space to land on
concing works, but the bags dont distribute concs so you have to go in and out with only 3 concs
skybox is eh, as deep as the valve grids allows me, so if you drop a flag down, you won't see it down there