I might try that out, i usually dont have much trouble with HP though due to the extra 800 or so from RoA and the even without Sunfire Cape have 3k at 18 (i agree with only boots defense is quite low).

I dont like this 1 because if you are going ap tank and jungling you are going to need survivability earlier to be a tank so maybe go for a giants belt then a RoA then the rest of sunfire or something but not really a tank build if you dont get survivability till the end.