Another way to come at this question is, how good is the current offer? This would capture both the current magnitude (points), how likely the offer will come around again, and thereby which card(s) to apply for first. Perhaps a poll with ratings such as:

0 - Standard offer for every sucker off the street
1 - Better than standard, but easily available
2 - Good offer, typical of what an informed FT'er would find
3 - Very good offer, it probably be available again, but why wait?
4 - Great offer, comes around only every 2-3 years
5 - OMG! It'll never be this good ever again!