To counter Viktors ult. If he ults to you,press reversal and press S on your keyboard or your backwards button while on reversal and aiming on viktor,or once your reversals almost down you can switch your aim to other champs if youd like to

If ruckus ults,stand in front of ruckus like rlly in front and near not far,then use Iceblock.It will actually do dmg back to ruckus.Try it!