The chaos of the battle was what he needed.
Lander knew that approaching Lynd, who had numerous Paths, would be next to impossible. And while they noticed that Lynd couldn't use different Path's together, there was still the issue of how long it would take for Lynd to switch from using One Path to another. The Intelligence team of the Unlocked noted the changes in Lynd's physiological anatomy back in the Lingkaran. Lynd's cells would change from one form to another to make an attack.
Lander saw the opportunity and rushed for the kill. Dara and Danny's attack made Dyne utilize Meryl's Path, and his body tried to combine both desolation and Meryl's light. But just as Lennox stated, there was an unstable reaction when Lynd used an attack. Lander gambled and used this moment to attack.
His fights against the Covenant had taught him a lot. He soon bested the Covenant as he managed to develop his Zone.