Ive done quite a few decent lumps of 'w's and feathered 'w's on a 33lb anyang. Its very doable on a small hammer, you just need to work quick and smooth, and plan to get the most out of each heat.
When forging 'w's (especially when drawing out at the end) dont be tempted to get the last bit from the heat and work to cold. The pattern has a very annoying habbit of shearing the weld boundarys!
The trick I have found to success with this pattern is to give the welds a good soak after you have set them. ie welding pass, then quick back into the forge, bring up to full welding heat and then leave it at welding heat for a good 4 or 5 mins before taking it out and working it again. This is superespecially important before you start to draw the billet out after creating your 'block' of compressed 'w's
Hope the above kinda makes sense!