It's hard to argue against RDLs when it comes to hamstring and overall posterior chain strength and development.
The biggest drawback of RDLs is that they can be tough on the lower back. If that's the case, try doing them with a trap bar, or if that's not possible, from a dead stop in the power rack.
You can also try doing them for higher reps at the end of your workout so you don't need as much weight, which even with lighter loads serves as one hell of a brutal finishing exercise, especially when using the constant tension method.
If you've been around weight training for any length of time, you've probably read or tried an arm specialization routine. There are a bunch of these around with different cool names for what amounts to the same old shit: do a bunch of arm exercises. Yeah, the exercises change and the sets and reps change, but it still amounts to just doing more arm work.