RE: Just got the Phoenix Super Decathlon
Best takeoff method for mine is what works for eveything.
If you can taxi the airplane you should be able to takeoff safely.
Taxi it out to the runway. If you can do that, the rest is going to be only a tiny bit harder. As you line it up, start to taxi it again. Straight down the runway. Then advance the throttle. Don't firewall it and pray, just advance it.
The airframe will have a chance to start flying as it increases speed. The engine and prop will not have the chance to throw all it's torque and twists at the airframe before the airframe has a chance to fight back. As soon as the airframe starts flying, the engine/prop won't be an issue.
Steer the airplane all the while with the rudder. You do that all the time when taxiing. It's not any harder to do during takeoff. Unless you firewall the throttle before the airframe is flying that is.
The airframe can't guide the airplane before it's up to flying speed. It's got no purchase. It's just along for the ride until it's to flying speed. So give it the chance to get to flying speed. It doesn't take long. But it does take longer than it takes for the prop and engine to have an effect. They're already working quite effectively. They've pulled the airplane all the while it was taxiing, right. Give the airframe a chance to be working too. The rudder on this airplane especially needs a bit more speed to start flying. Until it is, slamming the throttle forward is kissing that airplane goodby.