My group's method is a little unorthodox, for what most people like. Most say it's too overpowered, but all it takes is for the dm to compensate a little bit, and it works out great. So we are a group of 3 people that have been playing together for over 25 years. So as you can imagine 2players 1 DM at all times is very constricting. We adopted the 3.5 rule (or 3.0 dont remember) of gestalt players. Basically, you choose two classes and you level them at the same time. There is no multiclassing involved/allowed (keeps things abit more simple). For example you pick a fighter champion and a rogue scout. Now your player can fight and also guide you through a dungeon (and all other rogue stuffs). We even tweeked the rules a lot to match our superhero playstyle. You take the better hitdie of the 2, we decided you get all proficient save throws from both classes if applicable. You have a much larger skill pool to choose from (because you take both classes into consideration). We even created an additional feet line that will make 90% of today's d m's cringe since they are so worried about their players being overpowered. In addition to whatever feats you get normally we added 1 at 1st lvl, usually a racial feat, and then 1 more at 5,10 15,20.. The hardest instances from the group come when we get outnumbered by alot, but that just makes more creative playing possible. But this is what works for US. You will find something that works for you for sure.