Yeah no that is way too big a task to do in one go. I would suggest that you invite people to rank a category at a time, and rather than split it up into individual rankings 1-16 have them ranked in groupings (1-4, 5-8, 9-12 and 13-16). It gets a bit too arbitrary when having to separate down to individual rankings in some categories.
In terms of halves pairings I would say:
Category 1 (guns, speak for themselves)
Norman/Moses - both quality players but not top tier for mine and both still have a lack of consistency in their games and a lack of game management ability
Green/Johnson - experienced, should complement each other well and Johnson is 2nd only to Morgan over the last two seasons in attacking stats (2nd most LB’s/game, 3rd most TA’s/game and 7th most tries/game)
Walker/Reynolds - experienced, complement each other well and Cody Walker generates a lot in attack (most LB’s for a half over the last 2 seasons, 8th most tries and 10th most try assists)
Munster/Croft - I rate Munster very highly and think Croft has served a good apprenticeship
Milford/Nikorima - I don’t rate Nikorima and think the combination lacks game management ability
Watson/Pearce - I have question marks over Watson at 5/8 for 80 minutes
Hastings/DCE - DCE is a gun but Hastings/Croker/Wright are either ordinary or unknown quantities
Moylan/Townsend - I don’t think they will complement each other well
Reynolds/Brooks - On paper it’s not a bad combination of skills but Brooks has not performed well in the recent past and Reynolds is coming off a bad year - I would be more comfortable having DCE, Pearce or Milford in the halves or a premiership-winning halfback in Towsend combining with an Origin rep in Moylan
Elgey/Taylor - Elgey was awful last year and while Taylor is highly rated he was middling in try assists generated over the last 2 years and does not threaten the line much himself
Austin/Sezer - Neither managed games well last season and of the halves were ranked 27th and 29th for try assists/game over the last 2 seasons. They are why Canberra failed to fire in 2017.
Foran/Frawley - Foran looks busted to me and I saw nothing Frawley to get excited about last year.