Hello,
The way we do it at Air Macau: We take off, we disregard the lateral guidance of the FD initially: As we cross 200 feet AGL, we start turning (max bank 15°) then at 400 feet we follow the FD to comply with the RNAV SID.
Some captains even climb to 400 feet first before starting the turn. Never heard a complain about that.. And there is no obstacle to worry about... Anyway unless you are heavy on a hot day, you are generally above 400'' before the DER, at least on A 320s.
Just for interest, according to our SOP we are not allowed to turn below 200 feet AGL and between 200 feet and 400 feet AGL, max 15° bank then 30° above 400 feet AGL.