I would suggest that you do not replace rubber unless you feel it is necessary. If you rubber feels ok why bother changing just because someone else...
Have you ever used H3N for longer periods of time before boosting it? Based on my experience after 2-3 weeks of playing they become a bit more alive...
Most of my teammates use (me included) use Asics Blade and a few members use Lezolines (those two are almost the same). I dunno about the cushion but...
When I used to set Tibhar Junior robot for my clubmates (which is opposite of smart) I used to set top wheel speed max and bottom dead If I remember...