Not sure TBH. I mean Scourge stalemated Act 2 HoT who is canonically above Satele (class story) who is equal to Marr. Plus it's quite possible by the end of Act 2 Scourge was even more powerful than The HoT given he said he could've killed him partway through Act 2 and The HoT at the time was in a base filled with Republic Soldier and a former Dark Council Member IIRC. It's quite implausible in a few weeks at most The HoT could've grown equal to Scourge when the latter could've killed him when he was surrounded by Republic Soldiers and a former Dark Council member.
It really depends on how much Marr and Satele improved which is unquantifiable.
It's also worth noting like half the Dark Council were afraid of Scourge and this scaling gives us a good reason why. I wouldn't say it's implausible Scourge is more powerful than Marr however I'll wait to see if anyone can provide a compelling argument for Marr in response.