Maagar Mochot conducted an internal scenario poll series for religious Zionist Rabbis
Scenario #1: BY & NU run alone.
2-3 seats Bayit Yehudi
1-2 seats National Union-Tekuma
(Neither passes the threshold)
Scenario #2: By & NU run together
4 seats Bayit Yehudi+National Union-Tekuma
Scenario #3: BY+NU+Otzma run together
8 seats Bayit Yehudi+National Union-Tekuma+Otzma
Scenario #4: NU+Otzma+Yachad
8-9 seats National Union-Tekuma+Oztma+Yachad
Scenario #5: BY+NU+Yachad+Zehut+Otzma
12 seats Bayit Yehudi+National Union-Tekuma+Otzma+Yachad+Zehut
Key:
Bayit Yehudi is led by Rabbi Rafi Peretz.
Tekuma is led by Betzalel Smotrich.
Otzma is led by Michael Ben Ari.
Yachad is led by Eli Yishai.
Zehut is led by Moshe Feiglin.
Jeremy's Knesset Insider 
The last two numbers seem a bit ridiculous.
On the other hand they can keep adding parties until they get to 61 or for that matter 120.
Scenario #14: BY+NU+Yachad+Zehut+Otzma+Gesher+Green Leaf+Livni+Tibi (Ta’al)+Ashkenazi +Lapid+Flatto Sharon+Pensioners Party+Man’s Rights in the Family+Casino+Amnon YItzhak
62 seats Bayit Yehudi +National Union + Yachad + Zehut + Otzma + Gesher + Green Leaf + Livni + Tibi (Ta’al) + Ashkenazi + Lapid + Flatto Sharon + Pensioners Party + Man’s Rights in the Family Casino + Amnon YItzhak
Feiglin is never going to join them. He’s much more likely to run with Ale Yarok.
Very interesting poll, although the numbers seem high. BY + NU is presently polling just over or just under the threshold; the others are at about 1%. It is hard to see how they reach 12 seats without drawing a substantial number of votes away from Hayamin Hehadash.
I agree that Feiglin is unlikely to join them, so it would be great to know what BY+NU+Otzma+Yachad would get (that is, Scenario 5 minus Zehut). It would also be interesting to see what a combination of those parties plus Hayamin Hehadash would obtain if they were to run together (if that is even possible at this point.). That is, what is the size of the vote to the right of Likud, if those parties were to run together?
So Zehut is worth 5% of the right-wing vote according to this poll, and its voters are not limited to the right but also come from the left.