Let's look at strength. The average man can military press about 80-100 pounds. But since we're also factoring in women and children (and babies? -- "every human on the planet"😉, this number should be much, MUCH lower. However, for argument's sake, let's say an 'average' press of 50 pounds.
50 lbs x 7 billion (round-off) = 350 billion pounds = 175 million tons. This is "high megaton" strength (ie, lifting =/> 100 million tons but < a billion tons). This is a mountain-lifter, hardly on par with a planet-pusher.
Speed. Average man can run about 20-25 mph. But again, factoring in women, children and babies ("every human on the planet"😉, significantly lessens this, but let's say 10 mph.
10 mph x 7 billion = 70 billion mph = about 100x lightspeed. Now we have something here...except that we're simply amping human ability with no special provisions (eg, no speedforce), so this Composite Human could not even reach lightspeed. At best, s/he is "high kilosonic" (can reach Mach 100,000+, but less than Mach 900,000 ,ie, lightspeed).
Durability? The Composite Human would have to be tough enough to lift a mountain and withstand high-speed effects (like friction with the air, inertial control, relativisitic effects). Very hard to judge this, so let's just say our CH could withstand explosions equal to big asteroid impacts: "high atom" durability. Maybe low-nova durability (can withstand being inside a star short of the core).
So, just looking at these three factors, *Composito* has --
-- high-megaton strength
-- high-kilosonic speed
-- high-atom/low-nova durability
IMO, Composito is not beating any high heralds. Low? Mid? Don't rightly know.
Fun with numbers. 😮💨