seems like a good build but, i see no point to put 5 masteries point in evasion and nimbleness and perseverence is proven to be absolutely useless. and i shouldnt go on a frozen heart because thats up to the supporters in your team to build.

I'm not going to vote anything until I try this build but I do have to say that your video doesn't show your singed build in action what so ever... All you were doing is a 3v2 with some pretty newbie players.

@Hell_Pet you want expanded mind over Awareness with singed because it gives you mana. Because of singed's passive ability he gains HP depending on 1/4 of your total MP.

see this build is for later defense and some early squishy killing so faster exp wont help later

This looks like a good build. :) You got some AP and nice tanky stuff. Pretty expensive though, but solid. Thumbs up. I would pick 3x Strenght of Spirit though and forget the 1 point in Harden Skin. :)
And I would also put the 4 points in Awareness instead of Expanded Mind.