Not sure, I would have thought the most likely scenario for SF to surge is if FF & FG were together in a coalition government, then SF can position themselves as the de facto opposition.
Instead, even if FF or FG are tarnished by spell in government, the other maintains a sense of distance and can still at election time present themselves as the opposition. Which is what FF are doing now.
As I said may work for FF in this Election, long term not so,
If I vote for FG Or FF which 50% who come out to vote do to be honest I will finish up with my vote split one in power and one in opposition ,
so the 50% becomes 25% of a government with the rest made up of a rat bag of TDs holding possibly over 50% on cabinet positions,
Even in good times the 50% FG/FF supporters will not be happy with a government like this, a very small change to SF support will bring them higher than the 50% who vote for FG/FF Mary Lou could finish up in the top position sooner than you think,
FF and FG will be attacking each other at General election time lowering both core support base ,The last time I checked it was down from the last election,
I suppose what I am saying Is a vote for FG/FF at best is only half a vote when it comes to power as most quarter of a vote,
If FF support goes up a little and FG fall lower than SF by election day I would still expect FG to have away more TDs Than SF but give it another election they could be higher than FG/FF going into next election ,