Cost: 30 Hatred / Lay a trap that arms after 2 seconds and triggers when an enemy approaches. The trap has a 2 second re-arming time and can explode up to 3 times, each time dealing 200% weapon damage to all enemies within 8 yards. / You can have a maximum of 3 Spike Traps active at one time.
Ok, yes the arming time was increased from 1.2 seconds to 2, but now it explodes 3 times instead of once, so in fact it works similarly to the present Echoing Blast.
But now imagine this: Spike Trap with Scatter rune + Custom Engineering. Spend 60 hatred for 6 mines, that explode 3 times for 200% weapon damage each = 18 explosions and in other words 3600% weapon damage. Wow, talk about a mine field, can't wait to try that one out! :D
Now imagine placing them in a narrow corridor :D