Iron Man faces the Transformers greatest foes. He gets 6 hours inbetween rounds to fix up his armor a bit. He's wearing the armor he had during Infinity War. Just one rule: no hacking into each others systems (not by means of nano-tech either).
__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk
Bayformers are huge, and not very durable. Tony would blast most of them to pieces. However I'm not familiar with anything from the Wahlberg movies, or rise of the beasts.
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Besieged by countless foes, his eyes they are aglow, longing for the fight. He stands upon a mound, doesn't aim the throw, just lets the hammer fly!
in general, movie transformers aren't very durable at all (certainly not if they were up against tony's tech) and are stupidly slow in comparison.
so imo tony gets to at least 8, and the only reason i'm not sure if he could beat the fallen is because only a "prime" could kill him or whatever. quintessa is the only real threat one on one tbh.
He shouldn't be able to kill Scourge either as he is powered by "Dark Magic" supplied by Unicron and has walked off seemingly fatal injuries multiple times before he fought Optimus.
ergh... Live action transformers are.... considerably less capable than almost any other version of the transformers. MCU Ironman is much closer to his comic counterpart, and yeah, Ironman's capabilities are considerable, and easily able to be within range of penetrating the TF's physical vulnerabilities that were inbuilt into them by Michael bay's piss poor storywriting.
Only exceptions would be Scourge and The Fallen due to Deus Ex Machina, and we all know Tony has overcome worse than that before, and with far longer odds.
With his nanotech armor, IM should be able to clear. The Transformers are big and powerful but they're also one-trick ponies, usually depending on melee or blaster fire to win fights.
IM took on a 4-stone Thanos with that armor and did fairly well for himself. He should be too fast for the Transformers and packs enough oomph to damage the robots.