That's only if Limbo can use all of the original's jutsu, but they have only used physical attacks in ALL their appearances.
-Against the Bijuu.
-Against Naruto.
-Against Naruto and Sasuke.
-Against Naruto and Sasuke after getting his other eye.
Let me put it this way:
-Madara said that Limbo clone is "him" existing in another dimension.
-Madara can use Jutsus.
-Thus "him" that is existing in the other dimension should also be able to use Jutsus because nothing suggests otherwise.
Limbo is a clone technique, and in every clone technique, the clones are able to use the original's Jutsus whether it is Shadow Clones, Water Clones, Earth Clones, Wood Clones etc...
saying that a clone can't use Jutsus of the original just because you didn't see it yourself using them, is just like saying that a normal Human can't pee just because you didn't see him yourself pee...
"Equal ability" could easily mean that they are physically and mentally equal with the user. Shadow Clones main advantage is being a clone of the user. Limbo's main advantage is that it's invisible and cannot be touched by anyone w/o Hagoromo's power, meaning there are less than 5 people in the whole NV who can perceive it and overall out of people who have ever existed less than 10 can perceive it. Arguing that Limbo is an RG tech thus it has to be able to do what shadow clones can do doesn't help you when the advantage it has alone makes it a million times better than a shadow clone.
the DB stated that not only will the Jutsu user gain a duplicate of himself with equal ability, but it will also be invisible. so obviously being invisible is not the only advantage that the Limbo grants. "duplicate" means that they are
exactly the same and "equal ability" could mean power. they are basically a copy-paste of the user with same capabilities plus the ability of not being seen.
You really think an invisible and impervious clone that knocked down all 9 Bijuu so fast that they hit the ground at the same time is weaker than a Shadow Clone just because they can't use the original's techniques? :lol
the reason that the clone was able to blitz all the Bijuus was that the user had great physical abilities to begin with. (and who knows, his Limbo could've used Susanoo). let's say that part 1 Naruto had a Limbo clone, do you think that it will also be able to blitz all the Bijuus?
and you are the one who is arguing that Naruto's Shadow Clones are on par with Madara's Limbo clones... and you admitted that if Madara's Limbo clone can access Madara's techs it can wreck Naruto's Shadow Clone but you are saying that it can not and that's like saying that a Shadow Clone of Madara can wreck Naruto's clone but Limbo clone can not...