what i do if i have the resources is boost one of the other teams but if you're fighting on 2 fronts then you more than likely are pretty strapped.

What I would recromend is fortify a choke point with turrets and fighter/bomber ships and move the rest of your fleet out to bypass their main force and destroy some of their research and culture building that usually pisses them off enough to wherere they try to chase you - if you're lucky you can make one big circle and hit both of the other 2 AI's

often times if you can get both of their fleets together it becoems one big blood bath - and you can escape and rebuild while they kill each other.

or they might just throw the pirates at you too :/

then I'd say find where the two strong empires' fronts meet, and hit one of each of their planets.  the AI will always break off any attack to rescue their planets, as long as they have some form of sizeable force.  I would suggest pitting the AIs against each other with bounty. (i.e. place a decent sum on each, to start a bidding war between them. 

another idea is to use an extremely strong counterattack.  as soon as you fight off an attack, follow that fleet until you have destroyed a sizable portion, including the caps.  then race back to your territory, in case you have to defend against another attack.  the counterattack will buy you plenty of time, and will allow you to deal with them one at a time.  if you can, narrow it down to one chokepoint each, and stay on the offensive.  the way the AI is set up, it will not try a diversionary attck to pull your forces away, so if you are attacking somewhere, they won't attack you.

Whoops, forgot the quote! sorry about that.

Thx! I was finally able to reverse the tide against 1 AI and cleared one of IT'S planet (unfortunately, my colonizing cap is on the other front and is taking it's dandy time getting to te other front), but  i'm still questionable on the other front. The map is also structured as the central star prevents any mutual fronts (meaning each empire so far has 2 and only 2 fronts) As 4 the bounty stratigy, i knew about it and tried once, to no avail. School's starting up again, so i'm not quite sure when i could finish that campaign. (Too many other activities going on)

I was the same - my first cap was space egg, and the rest were pure combat ships.  I learned the lesson of the second Jarrasul the hard way - against a chicken TEC fleet that would not stop running whenever I put one ship in its grav well.  now it's space egg - Devastator -space egg, in that order.  I always max my cap usage, eliminate theirs, and love using the Volatile Nanites+Phase Missile Swarm combo.  their fleets are simply devastated. 

ended up finishing a game within an hour using my 1-2-3 punch of caps i mentioned first.