Schatz will probably only be gone for one game. City willl likely get back Genia as he hasn't play much for a while and may not make the Wallabies 23 for the last Bledisloe.
Vikings edit: Rising on 30 have the comp sealed up.
If City on 16 win even just 1 out of their last 3, which is fairly likely, they'll end up in 2nd or 3rd. City have Rams away, Rays away, Vikings home, of which they are probably favourite to win all 3 but more likely will get 2 or so. City seem to be one of the few teams not picking up many injuries - in fact they have been getting stronger as the comp goes on, with Genia, Cooper, Gill, Browning, Turner (and to a lesser degree Faagase) all returning after the start.
The Eagles on 15 have an easier run home than City: Stars (likely bonus point win), Vikings away (likely close game), Spirit home (likely win with no regular Force Super rugby players).
I'd say that 2nd / 3rd will be a close run thing, with maybe the Eagles pipping City for 2nd despite winning less games.
I'd pick the Vikings on 11 for 4th, but they seem to be accumulating a few injuries and have a few tough games vs the Rays, Eagles and City, so it may be a close run thing.
Spirit on 11 are also in trouble, with a bye, home game vs Qld Country (which they should win) and away vs the Eagles (which they should lose).
Rams on 11 also have a tough run home, playing City, Rising and then a bye, so I think they are toast, probably not winning again unless they upset City.
Finally, the Rays on 10 have the Vikings away, City home, and Stars home, of which you'd expect them to win the last only.
So, 4 teams fighting for 4th, and I reckon all 4 look like winning just 1 if their remaining 3 games. However, Vikings look most likely of picking up an upset win or even a few close losses vs either the Eagles and/or City, so they're my pick for fourth.