Nexus strength is comparable to the bodyguards. Nexus could even win against the bodyguards without any difficulty.
Laxus is stronger than Nexus, but they always draw in every sparring practice.
Alex is also an expert in fighting, but he never won against Nexus or Laxus.
Alex realized one thing about Laxus and Nexus. Both of them never fought in their full strength when they fought against him.
Alex saw Nexus and Laxus would always use their 100 percent strength when they had a sparring practice.
Alex knew his older brother's power is beyond human knowledge. Their level is too high for him to reach it.
They looked like a pair of monsters when they fought each other. The ground will shake like an earthquake will occur when they compete, and the walls will crack because of the force they exert.
Alex would always refuse them to have a sparring practice because he didn't want to get hurt.