The hardest thing is killing the 4kings, you can cheese it with charcoal resin and the stone armor set.
You can't upgrade any of your normal weapons above +10 because of the weapon matchmaking system. Special Weapons have their own ugrade system, I recommend checking it out online.
My character only upgraded his weapons to +5, so I have range invasions from 0 to +10 on players. Lvl is 46 for wide range invasions, you can also go up to 50 if you want, in that case, put remaining points on vitality.
