Multiple Object Advanced Riccochet greatly enhances the already extrordinary powers of the Glaive Riccochet Monkey.
~ BTD6 description
M.O.A.R. Glaives is the fourth upgrade of Path 1 for the Boomerang Monkey in Bloons TD 6. It enhances the ricochet ability of the Boomerang Thrower's Glaives by doubling its attack speed, jump distance between bloons, and pierce (to 100). It costs $2550 in Easy, $3000 in Medium, $3,240 in Hard, and $3,600 in Impoppable.
As of the Version 7.0 update, MOAR Glaives is best paired up with Red Hot Rangs. Despite not shooting around 55% faster than when upgraded to Faster Rangs instead (1.25*1.25 attack speed bonus), the +1 damage and the popping of Leads is more than enough to make a 4-0-2 Boomerang more worth it than a 4-2-0.
In the same idea, a 4-0-2 Boomerang can beat round 63 all by itself.