If you are around 40k power you should have no issues getting sannin with occasional loss to 55k people if people are struggling vs GNW ten ten thst means you got out blitz and you need to consider making a balanced team since you'd only lose to lot more power or if you have bad team comp . I think I lost a total of 3 times to the top and I got 45k which isn't a lot matsuri is much harder these days than arena imo because mm is less forgiving in matsuri in arena it will actually go out of its way not to match you vs higher rank. Stats certainly make a difference in arena you can pretty much tell straight away if you can win or lose a match it's in no way same stats.