Question on Volume

[faithonly]

Currently I’ve been following this bicep routine for the last 8 months 3x/week and have seen modest results. However I feel like I’m working harder but not smarter and that there’s a more optimal routine I could utilize.

- Incline Curls 3 x 12
- Hammer Curls  3 x 12
- Spider Curls 3 x 12
- Incline Hammer Curls 3 x 12
- Preacher Curls 2 x Failure
- Standard Curls 1 x Failure

Any thoughts would be greatly appreciated.