Our book says: with 2000 ft to go, reduce V/S to 1500ft/min or less.
Now whether you use V/S or CLB(SPD) mode depends on A/C type & limits.
I prefer using a "safe" mode such as a speed mode (CLB/OP CLB or SPD), depending on A/C specifics. But depending on environmental conditions, the A/C might balloon a bit in speed mode as opposed to V/S mode. Some operators forbid V/S at high altitude (which I think is good), but if monitored well, works too. Use common sense and situational awareness + airmanship.