1) How dangerous is T3, and is it worth the risks.

2) Somebody told me the anabolic diet can cause you to slip into a coma, is this bollocks or is there some truth behind it?

3) I am using Xenadrine (e/c/a) and doing moderate cardio, is this sufficient, or is it better to play with a little deca/winny ?

1. It is only dangerous at high does for long periods of time if you use it properly it will fine. I don't think it is worth the risks, because I don't think it works that much better then ECA and clen do. Having said that I think DNP is worth the risk because it works A LOT better then the above mentioned products.

2. I think whoever told you about this diet causing you to go into a coma is full of shit and I have never read anything to back this theory up.

3. ECA and cardio should be fine to lose the excess body fat. Also keep you diet clean and keep training heavy don't go into the "I'm dieting so I better do 15 reps with light weight" mode ,stay with your usual training.
If you are overly concerned with not loseing any muscle then by all meens take winny, but it will not burn fat although dieting with winny you will look better because you'll keep more muscle maybe even put some muscle on , and you will be more vascular which should make you look a little leaner as well.

Hope this helped