How can i lower lag from a meshpart NPC?

Basically, I have an NPC made completely out of mesh parts, on its own, it's fine. When I try to move it using the humanoid:MoveTo() function. Its ok for a couple seconds before it starts lagging. It will move a couple units, then pause, then move another couple and so on until it gets to the position. Does anyone have experience with this? Does anyone know how to lower lag?

-Btw if you say to not use mesh parts your NOT helping, this model is too complex to make with parts, I'm asking for a less lag solution, while still using mesh parts.

Thanks, -KamikazeJAM108867