MANKRIK
Grandmaster
Trap boxes are fun, but there should be more options available to the killer tinker. Think Engineer from TF2. There's a lot you could do with this - hidden landmines, deployable dummies that shoot arrows or provoke monsters, etc. None of this stuff would be powerful (PvPers won't be lining up to add tinkering to their builds), and would require significant materials and a 120 tinker to make and deploy, but it would add some variety and maybe integrate crafters into PvP guilds as support (fortifying an objective with remote weapons).