I just bought a 6'6" medium power fast action shimano crucial rod and an abu garcia revo sx 6:4:1 what line test, brand, and color would work best?

It's hard to say without knowing what your using the rod for. I think you would be happy with one of these three choices: 10-15lb Seaguar Invizx Fluorocarbon, 10-14lb Sufix Elite or Siege Monofilament, 30-50lb Sufix Performance Braid.

Those are the three that I choose to use on my baitcasting equipment and they fill my needs. I use 3 different types of line because I feel each one has a place where it shines. I use braid when fishing heavy cover, fluorocarbon for deeper water techniques and mono for topwater, cranks and other shallow presentations. Again, it's hard to say what type of line will suit you best when we don't know what the combo will be used for. It does not matter what other people think about a line as long as you like it. Try some different lines out and see which ones YOU like best. My .02 on line choice.

I have the exact same set up except mine is 6'10" i believe with suffix braid in the 30 # test and love the set up.

if i wanna use it for scattered cover and weeds, preferably throwing plastics and jerkbaits what would u say?