Gasurabazura isn't stated to directly compete with other Large monsters, however it is stated to hunt and kill
Kusubami, a Small monster that is a scorpion. It's not really clear what it would scale to. Of all things, we can add something to its
weaknesses. When in rage mode, the increased blood flow and strain on its heart becomes so great that if it stays enraged for any decent amount of time
it can either seriously injure itself or die.
Bogabadorumu doesn't have a twitter thread to work with unfortunately, the best I can do is hop onto the MH wiki and look at the ecology section where it is referred to as an apex hunter of its environment, but it fears other Zenith monsters and Elder Dragons or something. Still, nothing really to run with.
Gigginox also probably needs an addition to the Powers and Abilities section since it can seemingly just plant an egg mound to spawn more Giggi whenever it wants. It's stated that Gigginox is similar to a close cousin called Khezu,
even being considered more agile than it. Since the two are, at least in some facet, directly compared, we could I GUESS scale the two to each other (Perhaps a bit flimsy beyond agility and speed scaling, but still something I guess)? It's also noted that because it is sluggish and takes a while to become active, it can be
easy prey for Barioth and Tigrex. Baleful Gigginox is stated to be extremely similar to a regular Gigginox with onyl a few changes, which are primarily in its main method of fighting/element. Baleful is seemingly
infertile and cannot birth Giggi to aid it.
Also IDK if we still have a Duremudira profile but according to the twitter thread it has it is considered to be
as strong as Disufiroa in base form, and its transformation is considered to be even
more powerful than Disufiroa. So that's interesting.
Other than that, I think I've already covered all the other ones listed by DMUA as best I could, so if there are any other monsters we have questions about, link their profiles and I will do my best to look into it.