Need charts for practicing holds

I generally play difficulty 15-17 charts but I’m way behind on patterns involving holds, especially multiple at once. For those, I’d put myself around a 12-13 and I seem to have particularly few charts that can help me focus on this area. Can someone point me to some packs that I can practice with? Grinding the same 3 songs is pretty boring and I feel like it’s making me improve slower.
the pack comes with a difficulty table try the easiest first and use downrates if needed


Late reply, but this is huge. Thanks a lot!