I believe not using a polyester string puts you at a disadvantage. Every top pro in the world uses some type of monofilament string in their rackets.

Polyester string has a very simple structure: It consists of a single polyester fiber with a thin coating. This is called a monofilament string. Polyester strings are very stiff compared to other strings and are much more durable. This allows you to use a thinner string and still maintain durability while keeping a bit of feel.

Polyester strings do not move as much and offer greater spin and control than most other types of string.

You can also use a hybrid which consists of Polyester string in the mains and a multifilament string in the cross strings. This will provide you with some of the extra spin and durability of a polyester with the feel and softness of a multifilament.