Really depends if your END can handle it, and if you have a power slot to use on it.
(if my memory is correct) Tanker Manuver is 2.26% Def Buff, its not massive but its still a buff.
I currently use it on my Elec Tanker, and Teams of course like having an additional 3% (ish) Def Buff... ever bit helps.
But Really is dependent on your biuld and what your going for.
Main: Praetor Imperium Elec/SS/Mu
In order of general build cost and effectiveness, I would rate the pool powers in this order for Tankers:
Combat Jumping
Weave
Hover
Stealth
Maneuvers
Some builds can't use Hover because they are required to be on the ground for certain powers. Some people just don't like Hover. Stealth is another power some Tankers don't like, but once a mob is aware of your presence the stealth doesn't matter.
Heyas, running a Will/SS, currently @ 43 and just using SOs. planning to pimp this guy out as my main with a Defense build, and an alt pure damage build. While i am still experimenting in the SO world i am experimenting with powers. How does the Defense toggle from Leadership rate for usefulness? Is it used when people softcap Def? 9i could squeeze it into the build i am sure if needed)