In reply to terryturbojr:
Combining forearm curls with deadhanging exercises in a session probably better. Try to get a balance between longer deadhangs without destroying your joints such as reps of 30 secs on and off should be safe enough. Individual response (to injury and strength gain) will vary so experiment.
As for weighted chin-ups yes but worth doing a bit more variety. A session could/should also include:
- One arm pull-ups with assistance
- One arm lock offs
- French pullups (count to 3-5 at hanging,90degs, full lock, 90deg etc)
- Travelling pullups - moving side to side touching chin on each hand
- Power pulls - pull up as fast as possible and lower slowly
- Offset pull ups if you can sort it ie on a board or bachar ladder
Throw in some core exercises like attempted front levers, knee raises etc while you are at it.