problem maintaining proper parameters

[Aquattro]

First, and let's not go any further, what is the SG of your water? It should be 1.026. Next, the levels you mention aren't bad. Ca over 350 is fine and allows calcification by the things that need it. Alk is also fine, 2.2 mEq/l is natural levels. Multiply that by 2.8 for dKh. You're well above that. The reason to go higher is just a safety zone.
I drip full strength kalk 24/7, don't care how much. If my levels are off at my bi-monthly test taking, I adjust up by adding turbo calcium/baking soda, or lowering by just adding RO water for a day or two.
Finally, pH will fall and be lowest in the am before lights on, highest at night before lights out. A swing og .3 is perfectly fine and expected in a well stocked tank.