So far the thing that seems to be working best for me is using the water splinter with a magic-focused team. If water isn't available, I try to use the Death splinter with the monster that has the corrupted healing ability. I can't remember its name off the top of my head. Best of luck making it to silver by the end of the season!
RE: Day 2 in Splinterlands: I Finally Reached Bronze II (But I'm Still Clueless)