i usually clamp the direct to 4.00 or 3.00 and the indirect to about 1.5 or 2.5. this helps with graininess. also, you have your minimum bounces set lower than your maximum, this is faster but will produce more noise as it uses probalistic path determination… You should also turn off filter glossy to improve the accuracy of the reflections in the scene
Clamping stops the amount of fireflies appearing in the scene, allowing for quicker render times as less samples are needed to render out a clean image, but be aware that it can effect the quality of highlights in the scene if you clamp too much.
I’ve attached an image with some settings i think will work well for your scene
edit: if you have volume shaders in your scene, you can set the bounce count higher to like 1, 2 or 4. but even if it’s left at 0 it will still render out volumes okay but do bare in mind that higher volume bounce counts can drastically increase render times if you have a large amount of volume shaders present in the scene.