A few times with a group and a few times in a public lobby. Public lobbies aren't nearly as bad as they use to be but there still can be some pretty bad games from time to time. I got into a game once and someone was playing as power base kyle lmao
The best heroes right now are lynx kassandra (mini bosses) and special forces banshee ( war cry for horn phases ). But I've been in lobbies with players using different heroes and still won. But there were always at least 2 lynxes and 1 war cry. The best weapons are the deatomizer and metal marauder for mini bosses, and the surround pound for the horns. For crystals an Ol' Betsy or Bundlebuss as long as you have the proper hero in support to buff their crit damage.
You can look at all of my load outs and schematics
here and how I have the weapons perked ... the 2 loadouts I use for the storm king are 7 and 8.