While the goal may be to force a runoff - 6 challengers is 4 too many. The challengers should strongly consider who amongst them really has the best chance against Lindsay and narrow themselves down quickly so the election has no more than 3 options. The chance of the conservative vote being split 6 ways with some unelectable ultraconservative garnering the highest vote amongst them is actually pretty high.
Assuming, of course, that 2 or 3 of the challengers are not ringers brought in by the GOPe and Lady Lindsey in order to dilute the anti-Graham vote.