Who would you say is hardest tank to kill in this game when they are fully built?
I know everyone will have a different opinion on this, but for me I feel like Nautilus is pretty damn hard to kill and Sion or Garen as well.
Rammus even since you pretty much kill yourself when attacking him lol


. You can't kill what you can't catch.
and 
?
will quickly drain anyone that isnt fed.
makes me cry as a tank player :C
etc

imo
,
and
.
Good luck catching him

so early game(lvl 1-4) i just straight up out sustain them. They'd keep hitting me and hitting me, getting more confident with each auto, then when i get to half health i turn my attention to them and go all out because they don't expect it. Smack them in the face with a Q to make them realise that they screwed up by getting that close to me so early, slow them so they need to change their underwear, burn the ground around them so they panic, then Q them again to kill them outright and get my stacks. Apply auto attacks liberally.