Saber and I wing up most of the time. We don't actually use any specific tactics to come out ahead though, we just go by some basic ideas/rules.
We predominately use each other for SA. The only time we actually fly close together is when on auto-climb, on the way to a fight or RTB. I'll generally be reading a book at that point, so he'll holler if he sees a bad guy, etc. I do the same if he's off grabbing a beer, food, etc...
If we come across a bad guy while OTW to the "danger zone", one of two things will happen. If the bad guy is co-E, alt, etc, (or above us) we let him pick one of us, and the other flies away. If the bad guy is lower, etc, one of us will kill him while the other flies away. The guy that flies away stations himself between his "wingman" and the main fight, to alert the "fighter" of new arrivals, and to intercept/kill them if possible. If the "fighter" dies, the surviver gets to chuckle a bit at him.
We look at it like "supervised" 1v1's. We'll let each other die that way, in a 1v1, but will jump in to assist anytime it becomes 2v1 or greater. The "supervisor" stations himself just out of icon range (to minimize stress on the potential victim), and watches for bad guys.
The only time we violate the 1v1 rule is when the engaged wingman is damaged, low fuel, low ammo, trying to RTB, etc...
We don't 2v1 unless we're exceedingly bored, and are suffering a lack of potential victims. Even then it's not a true 2v1, it's simply a race to see who can kill the poor guy first. An exeption to this is blocks of bombers- we actuallt tag-team those. Saber gets the drone on the left, i get the one on the right. The lead is killed by whichever is done with his drone first, or who "needs" more kills...
2v2, (or 2v more)- we actually help each other out and work as a team. Lots of SA related chat, and working to set up the victims. If the 2v whatever degrades to us v 1, one of us flies away again.
We generally work the edges of a fight, dipping into it to drag a few guys out with us, or with one of us. Once just out of icon range of the main fight we kill the bad guys, and go back for more. Most often this is one of us dragging a guy out for a fight/kill, while the other "babysits" where he can supply SA to the wingman who's busy. We take turns watching out for each other based one who currently has more kills. We try to keep it even.
We find this strategy to be extremely effective in allowing us to have "quality" fights- without worrying about getting cherry-picked, etc... Not exactly a "win-the war" wingman set-up, but very effective in generating the fights we prefer.
MtnMan