Currently, my primary methods of getting stronger are:
- Gain XP and level up
- Buy better equipment at the auction house
However, I know that past a certain part in the difficulty curve, I won't be able to rely on the first anymore - I'll be at the level cap. Also, it seems like the supply of truly awesome "top tier" items in the auction house is likely to be limited.
I also know that the game gets hard - mega hard. I'm playing Witch Doctor, and I've been told that this means my road is likely to be even harder than some other classes.
What should I be doing to grow stronger once I'm at the level cap and past the point where I can buy my way out of danger with the auction house? Should I be attempting to farm a particular item or item set? Is there a skill or set of skills I (as a player) should be practicing that makes the game easier?