What can i use to incorperate my propellerhed reason to my nuendo 11

how to improve lower laencey on nuendo 11 with tascam IFFW-DM driver win 10

Um, these are two unrelated questions.

Propellerhead Reason uses ReWire to connect to Nuendo, when used stand alone. When used as a plugin, you don’t need anything else.

As to the latency, you need to lower it via Nuendo under the audio settings, until it is acceptable to you.