I'm predicting Ivory to not get really close to 276 carries. If they want to keep him healthy all year, I think they limit him to 190-200 carries. I think he catches less than 10 balls all year. I think Goodson could get 150 carries, with another 75-100 split between Powell, FB, QB, WRs.
OK, let's examine this, assuming Ivory is traded to the Jets.
Ivory's career ypc is 5.1, and his lowest single season ypc is 4.7. This despite dealing with various injuries.
Some might say that is inflated due to the Saints' strong passing offense. IMO that is hard to know for sure. Thomas (4.4 ypc) and Ingram (3.9 ypc) were not as good over the past three years. Sproles (6.2) was better, but on substantially fewer carries and also likely running mostly from passing situations, whereas Ivory was typically running in standard/running situations. Still, moving from the Saints offense to the Jets offense, and also increasing his workload beyond what it has been in the past could lead to a reduced ypc.
Last year, the Jets RBs collectively averaged 4.03 ypc, compared to 4.4 for the Saints' RBs. Making a similar adjustment for Ivory would drop him to 4.7 ypc, but I don't think that's quite enough. I'll go with 4.2 ypc, which I believe is fairly conservative.
Using 200 attempts, that works out to 840 rushing yards.
Ivory only has 3 career receptions, and he averaged 10.7 ypr on those. I think he will likely catch more passes than you do, but let's just go with 5 catches on the season for a measly 35 yards (7.0 ypr).
Greene had 14 rushing TDs over the past 2 seasons. 10 of those were inside the opponent's 5 yard line. It seems reasonable to expect Ivory to fill the goal line role, at least on downs that are not obvious passing situations. IMO it is reasonable to project Ivory with 6 rushing TDs. That is right in line with his career ratio of 1 rushing TD for every 32 rushing attempts.
840 rushing yards + 35 receiving yards + 6 rushing TDs = 117.5 fantasy points.
Last year, the #24 RB in my non-PPR leagues was either Willis McGahee, with 121.2 fantasy points, or Danny Woodhead, with 116.7 fantasy points.
So this analysis would put Ivory squarely on the bubble for making the top 24. And IMO it is reasonably conservative. The only major risk with this analysis is whether or not he will stay healthy.
I play in leagues where 30-56 RBs can be started in any given week. If Ivory gets 200 touches, he will definitely carry useful fantasy value.