Time v/s accuracy in Rc

I am solving Rcs from past 10 days and one thing i want to ask is that in these initial days of solving RCs, we should focus on solving Rcs with accuracy or complete Rcs with setting a time limit.

For example, when i am completing the Rcs without setting any time limit (which usually takes 11-12 mins to complete the RCs), on an average i score 20 but when trying to solve the RCs within 8 mins, i m scoring 14-15.

Which stratergy should i follow in these initial days, Time v/s Accuracy??