Eh, so the feat of Optimus oneshotting Blackout wouldn't be very relevant.
See, that's my point. Optimus is way stronger than Tayuya, in that I very much agree, as 3 or 4x is quite good (It would be less than 4x as she upscales a lot from the feat that's there), but the scaling chain provided hasn't convinced me that it is to the absolutely ridiculous point that Blackout is.
There's also the fact that even if she was 4x weaker, it wouldn't mean her blows are ineffective. While Optimus would be focusing on the giants, she can be attacking him herself and scale him, making it even harder for him to catch her. Besides, I don't see any problem for her to re-summon the giants.