Originally Posted by Zinroh
How will tanks stay competitive?
I've seen Malphites with enough armour to tank Nexus turrets AND all five of the opposing team AND 3 minion waves. Or Volibears with Warmogs, Frozen Mallet, Sunfire Cape. They'd dive fountains for kicks. Say you can reduce 70% of their armour after Last Whisper, BC, plus a few ar pen items. 400 initial armour leaves 120 after all that. Which sure, is pretty low. But it's still more than your AP or AD carries. It doesn't look like you'll be able to reduce that much, maybe 55% in a normal situation? So 400 to 180. Still a large decrease, but it's not enough to break the game.
Probably not even enough to kill the armour stacking Malphite with the Thornmail, Frozen Heart, GA, Randuin's, Zhonya's, Ninja Tabi. 467 armour minus 55% should be something like 210.95 which gives a 67% damage reduction? Plus that 10% reduction for auto attacks from Ninja Tabi, the 40% bonus from Malphites ability, random multipliers/additives like Soraka's Infuse, Aegis, Taric's Shatter, Runes, Masteries, Base armour, etc.
A LoL game without armour tanking is wishful thinking. One game with Malphite/Soraka on the other team will soon convince you of that.