I think I just had 1 end cost and a recharge (maybe 2 recharge) in Caltrops on my non-stamina Bots/Traps MM. (the end cost was essential because every drop of blue is precious to an old fashioned Issue 6 non-Stamina build)
They were the 'Get the hell away from me, I'm squishy' option. (And by god was he, personally, squishy. Bodyguard mode was for wimps
)
The fear/avoid was far more valuable to me than a tiny damage boost, given how much of a premium slots were on that toon.
Of course, then inherent Fitness rolled around and suddenly, with no change to the build, I had a ludicrously end efficient build... Hohum.