So far I have:
貧 :hin: poor
貧弱な: hinjakuna: poor, meager, limited
I could not find just the word impulse but I liked this one:
出来心: dekigokoro: sudden impulse
And for control I found
拝見 : haiken : verification, control
Its the control part I'm not sure of. There are other symbols for control (for instance 管理), and I'm not sure which would be best in this context. Also how accurate is 貧 for poor. I think 貧弱な would be closer in meaning for what I want, but I want it easily tattooed as well so the fewer symbols the better.
Ideally I want either 3 symbols or a 3x3 block. The 3x3 would be less open to interpritation, but less painful and expensive also.

貧弱な
出来心
(control)
Any help would be appreciated.