Even Fizz, when built full tank, is disgusting as hell

I've just had a game where I was playing as . The reason for that was because I wanted to test a theory. Since is currently considered to be very strong with a full tank build rushing and having Grasp of the Undying as a mastery, then Fizz can also be strong with that same build.

I was correct. Once I finished Sunfire Cape, not only I could push for days, but I could kill the enemy Gangplank and Lee Sin easily with that build. Even if I couldn't kill them, the tankyness offered by Sunfire Cape allowed me to survive and escape, something I couldn't do with an AD/hybrid dueling build or a full AP build.

I used to build top lane Fizz with but now I will just play him full tank, with . The latter build is tankier both early game (since I will be rushing tanky items) and late game (since I will build purely tanky).

Compared to the AD/hybrid dueling focused build, I lose the ability to kill opposing duelists, juggernauts, and tanks. Compared to the full AP build, I lose the ability to instantly 100-0 squishies. However, the full tank build not only has immediate tankyness, but it still does the job of killing squishies, this time giving them a slow and painful death, with the fact that Fizz is difficult to peel.

It is disgusting how I am able to build Sunfire Cape and Iceborn Gauntlet on essentially any champion and be able to kill squishies while being hard to kill myself. This wouldn't be a serious problem if tanks were doing that, but it's the assassins who are using that build to wreak avoc.

EDIT: Link to the battle: http://matchhistory.br.leagueoflegends.com/pt/#match-details/BR1/758718876/201721804?tab=overview