As said going flat out, you want as few on vectors as possible....requires a lot of monitoring and increase in workload. Vectors can sometimes be the best option to resolve a potential conflict, and keep aircraft climbing and descending. With radar, no situation is ever the same so going vertical, using vectors... your call. Good communication with the pilots can help, some are happy to sit and wait for the other traffic to pass if they get continuous climb after, but there are others that would prefer to take a vector to get a climb/descent.