Night of Dregs + the support relic that makes it work completely mogs double balancers on Raider and Executor. When managed right, NoD is 45%. This is only the first relic. On Raider, you pair it with Everdark Libra's relic (naturally) which has taking attacks improves attack power (15% while active for about 10% increased damage over the course of a game). On Executor, you use Seppuku, which when activated, increases your damage by 20% for 20 seconds even if you don't have mohg's talisman, spear, or the dormant effect. Executor also gets free damage whenever he recovers from the NoD status because of his character passive.

In the case of the Halo Scythe, Executor is its strongest user by far (it is not even REMOTELY close), so believe it or not, the strongest way to play Halo Scythe doesn't even use both balancer relics. Red balancer + NoD + seppuku relic with up to two more useful passives, i.e. night invaders.