First, a run off between A and C wouldn't have C with 60%. C would have 54%, the 6% of C voters would have to come from CBA. And if A is in the runoff, that 6%

First, a run off between A and C wouldn't have C with 60%. C would have 54%, the 6% of C voters would have to come from CBA. And if A is in the runoff, that 6% stays with A. These are post facto strategies though. You can only implement that strategy if you can guarantee all of that information. Which you can only do after the election. The first problem is that polling is an estimate. If you are wrong by a couple of percentage points, the strategy fails. If the results come back 16 (BAC), 16 (BCA), 23 (ABC), 39 (CBA), 6 (ACB), B now has 32 first votes and A only has 29. Next is getting the right number of people to comply. You could easily just mess it up and have either not enough or too many people cast the strategic ballot. If only 4% or less vote ACB, the plan doesn't work. If 11% or more vote ACB, A wins. In the end, strategic voting is a bit like voter fraud, talked about way more than is actually done. And implied to be a much bigger problem than it ever could be.