With adjustable cam gears you can adjust cam timing to improve cylinder pressure (and torque) at lower rpm.
Two things that will improve low end torque (and idle) are advancing the intake cam and reducing intake-exhaust valve overlap.
I would suggets advancing the intake cam +2 to +4 degrees while leaving the exhaust cam as installed. This efectively reduces overlap by +2 to +4 degrees. Once you are satisfied with the idle you can adjust the exhaust cam to give good top end power.
You may initially that +4 degrees advance improves idle, but you might want to retard the exhaust cam -2 deg to tune the top end. After retarding the exhaust cam, you might find +2 degrees advance on the intake is sufficient, giving a good balance of idle, low end torque plus power past 5000 rpm.
