is there a limit on how many tech's can be added to a loadout in GW and is there a limit on the tech level of tech's that can be added to a loadout???.
You don't add techs as such to a loadout (except the ability to build certain things), buffs are applied by multiplying or replacing the particular value of a particular set of units with whatever you want.
Nope, no limits; you can add any units, or do anything else a card can do. Look at media/ui/main/game/galactic_war/cards/gwc_start*.js for the examples, and don't neglect gwc_start.js, which has a handy list of units.
Here's an example how I created a "Cheater" loadout myself, the mod credit goes to trialq. I just modified it a bit. What it does is to unlock everything and to get 2 times hp speed dmg metal energy production etc.
