A few features that would be great to add:
1. Expand the play area one can see. The previous version of the hacked client had that and it made farming MUCH easier.
2. If your health gets below 40% and you have a health pot, use that first to get your health back up - helps in farming
3. looting - I use the "T" key on my keyboard to loot the first item in the group of a bag. The only way I can do this currently is run a second bot script that adds that functionality.
Note: I've looked into getting the IDs of all the items in the game so the garbage items can be ignored. The issue is I don't have skills in Flash coding so I have to resort to pixel searching.
4. Health pot and mana pot looting. If you have the space, automatically pick up out of the bag on the ground. If you have the max then the pot is used to "top you off" so to speak (Shift + click)
5. If any of your items you carry are health related you can specify the ones you want to go restoring health if your health gets below %40. Again, helps in farming.