Re: Low power on roll cast
Some great advice already, and perhaps a few other points to consider:
* Roll casts are most effective parallel to the line on the water, not good for changing direction (look into spey casts to change direction).
* Make sure that the anchor (contact point with the water) is ahead of you or you will rip the water and lose a lot of energy
* Larger D-loop = longer cast.
Can't understate that an effective stop is critical for creating the line speed for an efficient cast.