Why can she place multiple traps so quickly? I just lost a dominion match where a single shaman always had at least 2 traps active in the only way to get to the point from our base, and the second we'd hit a trap it would either be instantly thrown into the nearby hole, or an instant spinchop death, and if you survived that she'd just bleed you before you could even block. So I'm a bleeding, OOS shugoki, stuck with a shaman in a tight space. Fun.
Thom is also right. In Season 4 you can pretty easily dodge all types of traps by rolling at the right moment. I've had plenty people roll over my Nail Bomb as a Shaman, and done it plenty times myself. In past seasons maybe i could understand how annoying it is, but now traps have a solid counter. You just need to pay attention to the ground near any potential ledges or points, and if this Shaman was constantly doing it you should know to look out for it.