ur probably right with ber being better then jah.
I think u should go for the trade, it seems pretty good to me, but I'm on Europe so I dont really know what items are worth on East

tips:
vs ama
1.always keep teleporting, only stop to quickly switch to orb and hit m, then switch to teleport again and quickly go away
keep doing this till theyre dead
2.be patient, sometimes when ur opponent got alot of res, it could take some time before she's dead, dont try to stop and go head on, u will lose 80% of the time
3.sometimes u got guided arrows chasing u, when u see this and then see them dissapearing they are most of the time still following u and will hit u when u stand still even though u cant see them comming. To prevent this from happening do the following. Once u see the arrows chasing u and become invisible, look for those outsticking corners on the map that look like this
.....|
.....|
..._|______|_
.....|............|

.= passable territory
_ & | = walls

and teleport over the outsticking walls, this way the invisible arrows get stuck in there and are not able to hit u anymore

-vs melee barb
1.also be patient, it can take a long time before a good barb is dead
2. never get close, always try to be at least 3/4 screen away
-vs thrower barbs
1. same as vs ama's

-vs sorc
1. play as defensive as u can, 80% of the time the 1 who is the more defensive 1 wins, dont be TOO defensive though, thats not much fun

-vs melee assa
this shouldnt be to much trouble, keep teleporting once they use that teleport skill(cant remember name:S), teleport away and throw a orb rightaway

-vs trapper
keep teleporting in a chaotic way (just press all over the screen) so that they cant lock u, make sure u have enough fhr and fcr

-vs necro
just dont get hit by those bonespirits

-vs druid
same as vs barb

-vs pala
once ur being charged, teleport 2 screens away and start throwing orbs until u see the pala, then keep repeating this
-FOH pala
same as vs trapper, but once ur locked u have 2 choises, teleport really far away if u can make it, or go straight for the pala and go head to head

thats about it, just 1 thing thats important vs almost all classes
dont teleport in the same pattern over and over, if ur opponent is smart, he/she will notice it and can predict where u gonna be next and u will be dead

oh men , this turned out to be a little bit longer then I expected
just hope it helps u, maybe some1 has some more tips