Farming

Does it really matter where I farm as long as theres high level monsters and lots of em and they're dying fast? Hard mode that is.

I was thinking about either talus chute or frozen forest because they have a good amount of bosses.

Nope, that's what farming is. Some farms are more effective than others with better rewards or steadier incomes.

farming is best done solo... or with as few heros as u can manage
most often it is done in areas with highly valued drops to make more of the farming time
i farmed about 20-25 different areas with various builds/characters when i played ... i mainly farmed to get items that i needed or wanted for various things or to get something to help a guild mate out

That depends, naturally, on what you are farming for.
If you are simply trying to get as much loot (to merch) and gold as possible, then it doesn't matter. But if you are trying to get specific items (e.g. ectos) or materials (e.g. feathers), it's best to go to areas where those items or materials (or drops that salvage into them) are found.