There are SPECIFIC champions in the GAME called TANK KILLER,
THEY EXIST for a REASON, if every champions becomes tank killer whats the point of having tanks,
Tanks do alot of damage because the fights are long, not because they are op or anything is because of the Lack of Tank killers.
Vel koz is a Tank killer but no one picks him even in LCS.
He is a good champion but he tank kills poorly.
It's fun having a 500 armor rammus die in 2 sec to full AD team.