Trialists to date (thanks RR)
Andre De Jong* (Hakoah Sydney)
Callan Elliot (Tasman United)
Justin Gulley (Team Wellington)
Joseph Harris (Seattle University)
Te Atawhai Hudson-Wihongi (Auckland City)
Alex Rufer* (Wellington Phoenix)
Jack-Henry Sinclair (Team Wellington)
Peter Skapetis* (Central Coast Mariners) (AU)
Jacob Tratt* (Sutherland Sharks) (AU)
Joshua Wallen* (QPR) (AU)
Liam Wooding* (MetroStars) (AU)
If Tratt and Skapetis sign that would make 17 players.
One possible formation:

17 players above, all with A-league standard passing, touch, and vision (Kopa and Taylor on reputation, and Fenton and Lowry, when last sighted).
Must sign three more before the season starts, including one under-20, to meet the requirements of a minimum squad size of 20 and three under 20.
Could sign another three, but if no suitable players are available, I'd rather Rudan waited.
GK - suggest a third keeper only be signed if he ranks above Sail. Frees up an extra outfield slot.
Fenton - has played in just about every position, back, mid, winger, even CF once, and including lots of starts on the L. Could be a useful sub.
Skapetis - can cover CAM as well as LW and RW. Another useful sub, vying for a starting spot.
Questionmarks over Skapetis (knees) and Nichols (top two inches) - but at least they are talented and capable of winning matches.
One or two import slots left - top priority another top quality DM; second, a striker.
It's possible other Australians will show up at camp, now that the squad is looking stronger and has an Australian flavour.
