I think sadly Australian native animals were very very lame, hence why they were so easily eradicated.
Based on paper morphology alone one might assume marsupial lion is lb-for-lb about as formidable as you can get among the carnivorans, and possibly more formidable than any extant carnivoran in the large-weight animal range. Marsupials for a start tend to have greater bite forces than other mammals (in the case of marsupial lion, comparable to a large male African lion), and I'm guessing might also be abnormally strong and robust.
Other characteristics like speed, stamina, I'm not sure of. But game-wise they might be let down, somewhat akin to a brown hyena that on paper is impressive in some important morphological traits, but is just a crappy fighter. Maybe marsupial lion is a bit like that.
Regardless, it would have to go to the two hounds, even if the lion was a proficient fighter for a 250 lb carnivoran. The size difference isn't large enough for a carnivoran of that size to outmatched two veteran hounds of that size and nature. Found an old write-up Earnfart made on the hound on CF
carnivora.net/o-halloran-hound-t6973.htmlSays there that O'halloran hounds are used to lug boars of any size. So yeah what's the 250 lb lion going to do? With any skilled catchdog I'd probably want a pair of them to be almost under 100 lbs for them to both lose to an African lioness or male marsupial lion.
One could almost make the extrapolation that because the marsupial lion has the bite force of a large male African lion, that it is up there at that level in a scrap. But reality is it probably wasn't the case, probably more comparable to an African lionness of comparable weight.
If there isn't a thread already on it I wouldn't mind African lioness vs marsupial lion.
Voting would probably come back strongly in favour of marsupial lion, what with the awe humans tend to have for ancient extinct creatures along with the impressive morphology the marsupial has on paper. You look on paper at the physical traits of marsupial lion and eyes pop out of their head, like for one, as Tristan alluded to, claws with semi-opposable thumbs.