Hi Meg:
It is a personal self-paced thing, and you should follow your inner lead on it. If you feel the need to increase, try it ... and if it is too much, then back off accordingly.
In truth, with the rise of inner silence and ecstatic conductivity, less can be more for all the practices, including amaroli. Until that situation and a realization of it dawns, things can be a bit choppy now and then...
So it is all about taking it easy with our long term persistence in practices -- gentle persuasion, you know ... doing whatever is necessary to keep moving steadily and safely along.
Unlike some traditons, we do not have goals here to reach certain durations or quantities of practice, as this could be counter-productive depending on the course of our purification and opening.
Once we have the tools in hand and are familiar with how they work, the game is almost entirely in the self-pacing. This is where the science of yoga gives way to the art of yoga. The practices are the brushes and colors and we are the living canvas that reacts to the various stimulations by the artist.
The guru is in you.