Before I start, here's the battle simulater FAQ: http://www.vbaddict.net/content/63-Battle-Simulator-based-on-Replays
You can even use it on your mobile phones! Please spare some time in looking at my replay overview >_<
I have been solo-ing tier 8 since my 300th battle (I was a greater burden back then than now), and have always suffered low winrates on that tier.
I'm currently at a plateau (stats not going up for a week, wr fell 0.2%), so I thought I'd post here.
Here are some of my recent replays with not-completely fail teams (ones that die so fast I that I get f