Utrip Combat choices

Didn't play any utrip this season, but going to Florida, I got rid of all my utrip bats and invested in dual stamps. Unfortunately most of them are still sitting in the wrapper because of my daughter's travel ball and work. Of the following choices, which do you guys think I should invest so bp time in to break in to bring down...
2016 antivirus 275, 2015 wanted 275, combatant 15 275, 2014 antivirus 275, survivor 275, 2015 Greinert 275 (white/blue).
 
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