Tracking Force

Tracking heavy is said to be better than tracking light because less damage is done to a record if the cartridge is stable.Tracking at 3 could be a bit much.You could probably be alright at 2 but you may have a set-up issue it seems.

I had a Grado Sonata low output and it tracked anything at the manufacturers suggested tracking weight. Remember as you add (or subtract) VTF, you should adjust the VTA

By "hilly ones" I assume you mean warped. If it were me, I'd keep the VTF at a more reasonable setting and find a better copy of those warped LPs. You may not be hurting the records but you are squashing the life out of the cartridge's suspension. That can't sound as good as it should and it may shorten the cart's lifespan.