I'd say the cut off for the playoffs is looking around 70 points, possibly a bit higher, but unlikely considering a lot of the teams in contention are playing each other.
Leicester should finish top as I can see them getting at least 2 wins out of their final 3 games, though depending on results they could decide to rest players a bit more now.
Sarries should get second as I can see them winning almost all their games and probably getting bonus points on top. They are probably the only team realistically who could pip Leicester to first, but they can't drop anymore points really. Also they seem to have one of the most injury free squads currently. However, they are playing 4 teams chasing the top 4, so they could drop points.
Quins should have a 5 point lead over Gloucester once the covid result is resolved, but they have some tough games all against others chasing the playoffs except Leicester and they're first. Quins vs Gloucester could well be a key match.
Exeter have one game less than Quins, Gloucester and Saints, so really need to win everything. Don't see them beating Sarries, so they need BP wins against Bath and Bristol and then probably will also have to beat Quins.
Sale also only have 4 games, so need to pretty much win them all. Again don't think they'll beat Sarries, so need to win the final 3 games. Wasps could be tricky away and if they lose that then I think they're done.
Gloucester should move up to 4th and have 5 games left. They really need to win their next 3 and hopefully give themselves some daylight if other results go their way so that they are playing Quins for 3rd and then don't have to worry about beating Sarries.
If Saints play like they did against Irish then they have a chance, especially with BPs. They need to beat Bath, Bristol and Newcastle with BPs and then beat either Quins or Sarries, possibly both to qualify.
Irish really need to win all their games with only 4 left and even then it might not be enough. Need other results to go their way too. Also aren't playing the final weekend, which will be horrible if they are 4th at that point.
Wasps have a very slim chance, but considering many team above a playing each other then someone is going to get points above them, so they would need to win everything and see the points above distributed very evenly. Not going to make it and have too much ground to make up.
Bristol basically looking to upset those above them. Playing 4 of the teams in the play off hunt so can affect the outcome. Could pip Wasps in the table, but unlikely considering how they've been playing.
Worcester have big games against Newcastle and Bath to see who finishes bottom. Both at home so chance is as good as it gets.
Newcastle need to beat Worcester and then hope they pick up a scalp somewhere.
Bath are playing 4 play off chasing teams which will be tough games. Again they need a scalp and then beat Worcester on the final weekend away.
Anyway, those are my thoughts. I'll have a think about what the final table might look like. However, I reckon Leicester and Sarries will be top 2. The final 2 play off spots will be contested by Quins, Exeter and Gloucester. I think Sale and Saints have an outside chance of they win 75-100% of their remaining games and Irish and Wasps have too much to do.