In the 2016 Scottish General Election –
The SNP – 4 list seats with 953K votes ( 240K per seat ).
The Greens – 6 list seats with 150K votes ( 25K per Seat).
IF… 25K is used as a guide of votes per seat for a list only party then a 50% move from SNP to VoteIndependence could have resulted in 20 seats, these would have almost certainly been entirely at the expense of the Conservatives and some from Labour. A nett swing of almost 40 seats to independence supporting MSPs.
Of course voting intentions may well have changed and these figures are based on national not regional polling but the potential for an Indpendence Super-Majority is clear.