Depends on your class, but if you ever do AV, i recomend the Dragon gun that goblin tree makes, in a one on one contest the death ray(gnomish pop) dose way way way more dammage, to a single target, dragon gun.... welljust for giggles I parced the data form a AV match, well i caught 10 folks with it at onece with a average dammage of 64 damamge for 10 sec, so WAIT, I did 6400 dammage with one shot--- well it is not as cool as it sounds, nobody died, but I sure sofentend that rush across the bridge, it is most likely luck but my dragon gun rarely backfires. but ya the goblin only bombs are great, if your a gold buyer, na realy though "The Big One" is a rocken bomb but jsut not worth it unless it is a group effort thing, like one guy goes out and farms the Metal/stone one guy gets the pirates for rum, My alchemest makes rocket fule. I have done this twice making 20 bombs each time, I think so hard every time I thorw one because of the time invested,I still have 18 left, Yup I have only justified throwing 2(I ued them hevely before, but only 2 out of my last stack)
to me the biggest thing to keep in mind, to you want a quick trip to Gadget, or Everlook, for your transporter, because thats the biggest diffrence I see