In total, he is combining the power of his internal energy through the Living Armament Metac, the power of his mind with the Telekinesis Metac, and the power of his body to produce a powerful means of attack.
This combination of power puts his total power output at 1(Cultivation Rank) × (0.5(Body) + 0.9(Telekinesis Metac) + 1(Living Armament Metac)) × 0.90(Skill Amplification), which is 2.16 units.
An output of 2.16 units seems small, but it becomes much larger if this output is compared to the normal power output of non-cultivators, which ranges between 0.1 and 1 units.
For example, if he didn't have any cultivation, his power output would only be 0.5(Body). After all, it is only because he has cultivation that he can use Metacs and manipulate his internal energy.
So, compared to not using cultivation, his current power output is 4.32 times what he can achieve with only his body. This is why he can lift a hammer that only a giant should be able to lift with ease.
