One of the nice things about 1.1+ is having the big new heat shield. Before that, if you wanted to get a lander down, you either made it skinny enough to fit behind one heatshield or bolted a few together. Now there's room to stretch out a little more.  Exactly how much dV you need obviously depends on streamlining and the altitude you launch from. Streamlining is pretty essential, you want a few skinny stacks. Even using a less draggy mk1 capsule rather than the lighter lander can make the