Going for my 5th real skill

Now that I've got my 4th real skills and have reached lvl 40 where "I believe I can fly", my next target would be to get another real skill. It would not be a combat skill but passive skill i.e. defense skill. Now it is at lvl 11 45% and hoping to reach 100% in 2 weeks time. Yes...it will take some time as I need to concentrate on other things also. Then I would go for the ice skills.