Bit left field, but whats the chances Peers (if inside top 10) plays a bit with Smith next year and olympics? Have won plenty of challenger titles together and a few slam first rounds i think. At least they would know each others game...
Interesting idea, and has obvious advantages in terms of knowing each others games a bit (though presumably both have developed a bit since they last played together!).
But I think Peers would be keen to play with someone who he would have a greater chance of going deep or even getting a medal with, and pretty sure JP isn't that. JP is currently the eleventh ranked Australian in doubles, at 190. Even if he played a few more matches to get back into top 100, can't really see him lifting to the extent necessary for the team to be serious contenders.
From a medal prospects point of view, I'd think better option would be for Peers to play with either Kokkinakis or Groth (assuming Groth gets out of his current doubles form slump and they jelled as a team), or even Kyrgios.
So I'd suggest best possible combos, though obviously subject to testing out how well they play together (could have a play off outside an ATP match?):
1. Peers-Kokk; Groth-Kyrgios
Two best dubs players together; second team should have the ranking to get in (assuming Kyrgios stays motivated and gets his ranking up to reflect something closer to his real playing level and Groth continues to move up rankings a bit). Second team success depends on Groth getting out of doubles slump and Kyrgios learning how to be an effective doubles player, but at least potentially achievable - and if they jelled, could be a formidable combo.
2. Peers-Groth; Kokk-Kyrgios
Young guns vs more seasoned?! Could work, just need the special Ks to rediscover that junior Wimbly magic (which they haven't on their tour outings so far) and they could be genuine contenders. Kokk-Kyrgios would need to improve their rankings a bit to get in, but not more than would reasonably expect them to.
3. Peers-Kyrgios; Kokk-Groth
Two not so obvious combos that might just work. Excellent dubs player with best singles player, and two very solid dubs players (Groth form slump notwithstanding) who are both improving as players. Main issue will be whether or not Kokk-Groth will have improved their rankings (singles and/or doubles) enough to get in though.
Personally I like the idea of trying out Kokk-Groth as a team as it has some obvious utility as a DC option, but whether the two would come at that is a different matter.