Originally Posted by Duskofdead
1) You also need stealth detection or else having MR only slows down her ability to kill you--- it doesn't prevent her from killing you.
2) If you've built all MR tank she can just ignore you and decimate the rest of your team. Your team isn't going to be doing much if they've all built enough MR to stop an Akali with Hextech and Rabadons.
1. Depending on your role, a Lightbringer or Sweeper is necessary, yes. Though, as a defender, you have a choice if you want it, since the tower can be your Oracles.
2. Hence why I said "a little MR goes a long way". Now, if the enemy team is 5 AP (which I have had before), you can go "BUILD ALL THE MR!", then of course there is no reason not to build the MR since if your teammates aren't building a decent amount of MR at that point and aren't the one AD carry champ (if you have one, should never have more), then your teammates are just dumb.