@ket, at a glance your stats look good, I was at that stage about a month ago, before I started doing some serious AH hunting for cheap bargains. As always, if you can't survive, change your helm gem. Play style wise I think you;re trying too hard to get a good dps, replace soul harvest with a primary, like ghost bomb or spiders, cheap and long range, plus they counter waller in a way that splinters or bears never can. Your gear looks to be worth quite a bit, you shouldn't have problems if you change your primary, and if you still do, that gem needs to go.
@kenfused, well, your gear is much better than mine, so I have no idea what to comment on, but I guess I'll try. About the only thing i disagree with is your chest armour, since it has no sockets to further increase int to around 350-300, and possibly your belt, that needs to go too. Doubt at high MP you'll be able to sustain too long seeing as your ehp isn't exceptionally high...
@destrago, well, drop the MF if you can't progress, that and use life% in helm is something every struggling hero should remember. Survivabbilty is also an issue, so drop PtV and SA, and get Jungle Fort and SV.
Good luck progressing!