Make Light More Viable Early Game
3 light requires all of the 1 and 2 cost units available in Nasus, Jax, and Vayne, which can become very annoying if 1 of them do not show up, and force more rolling in order to catch it, or require a change of plan, which is also bad for the early game when you should be saving. Other good early comps allow for a 4 champ pool to get 3 to create a synergy in woodlands and predators.
I suggest changing Aatrox to cost 2. This unit could be serve a purpose. Currently, in comps with for blademaster it's suggested to replace Aatrox with blademaster spatula, and he's often replaced with light spatula as well in 6 light comps.
Another option is to add a 2 cost light unit to the set for higher chance of catching 3 lights. This would make 6 light easier, which may make it less attractive.
This game needs more reliable early game comps to allow for better competition to late game predator, poison and ocean, mage, summoner, inferno. If failure in the early game is too risky then these comps never become popular, and players continue to be funneled to the already popular comps.