1. Just read the passive skills, one handed blunt has 30% boosts. Use it for single target and aoe.
2. Dragon/Cursed weapons are the best. For example Antharas Avenger or Zariche Avenger. Don't even look at top grades, very few have them and they will cost a fortune.
For starters a +12 Bloody Krishna Avenger would do for you. Armors - obviously Bloody Leviathan +10 light set. Accessories - Angel ring at least +6, angel earring at least +8, blessed atlas earring. I could go on about each item slot, but just focus on atk attribute, p. skill crit power/rate, pve dmg, p.atk bonuses in each slot item.
"farm 2b a day" do you mean the picked up adena? 2b a day is a lot for picked up cash. You would need top talismans, top jewels, cloak +15, top artifacts. Each of those cost 300-900b depending on item and server.
Cheapest way to get good gear is to follow events and buy stuff that is on sale or that is given away in rewards. For example dragon weapon events 6 months ago, when they costed 2x less than what they cost now.
3. Create a Dominator with Hierophant dual class. This way you can have both and switch depending on where you go.