First of all, it's not recommended to use components at their maximum rated power or very close to it. You should always leave some "room", at the very least 10-20% to make sure your circuit will not fail or misbehave due to overload. 

Second of all, you can set the output voltage from the transformer with resistors connected to R<sub>FB</sub>, R<sub>REF</sub> and TC pins of the LT3002, as specified in its [datasheet][1] on page 5: <br>
 

> The ratio of the R<sub>FB</sub> resistor to the R<sub>REF</sub> resistor, times the internal
> voltage reference, determines the output voltage (plus the effect of
> any non-unity transformer turns ratio).

Third of all, do you really need the LDO at the output? Do you know why are you using it?


  [1]: https://www.analog.com/media/en/technical-documentation/data-sheets/lt3002.pdf