I'll speak to your second question concerning test charts for driver settings.
This is a good pursuit. To get the most out of third party inks or papers, it pays to experiment with different media settings in the driver. You would be looking for a setting that will give you the most ink on the page without having so much that it is puddling up, not drying, that sort of thing.
You will also want a setting that will give you an even distribution of color throughout the spectrum. This is easy to do with just a 1 page profiling chart that has its patches arranged visually - rather than randomly. With a visual chart, printed with no color management, look for a smooth gradation throughout the patches. For example, you should not see a sudden transition from shadows to light, with few patches in between. Check the 100% black patch to see that it is drying, not bronzing, or looking lighter than the others.
The 918 RGB chart included in ProfileMaker from X-Rite is a free download from X-Rite. Our own ColorValet Client software is free to download and use - and you can print out a visual target with that.