1. Swap the weapons around. Rama in MH, Claymore in OH. You'll see a nice DPS jump if you do that as the slower weapon should almost always be in the MH. As for which weapon to get, it depends on what you have access too. Shadow's Edge and Crytmaker would be great but Brytroll would be easiest to get.
2. Yes the leather badge belt would be much better for you as you are over the hit cap and can then change some of your ArP gems to strength ones.
3. Yes the Shrapnal star is better but only if you don't need the ArP or Expertise which as your gear stands at the moment you don't.
4. No WFS is BiS non heroic trinket. Keep the 2 you have now unless you can get a HrC DV or WFS.
50 AP on Bracers
Cat's Swiftness on boots
Use the nightmare tear in the blue socket of the boots and a 20 str gem where the nightmare tear is now - that's another 6 free str for you.
Drop your ArP to 1360 and eat ArP food. This is so you can use 10 Str / 10 Crit gems in yellow sockets.