the thing is a CCM flyback has just as low RMS FET current as a forward converter.
This could be done with a DCM flyback with two o/p windings and two diodes to share the 6amp out, PowerInt TOP249 or 250 to keep the temp down, We have designed these up to 32V 8A output (three diodes) 180-265VAC, at 90W you will be able to get 90-265VAC - all down to good transformer design with low and similar leakage and good coupling for the o/p windings.
Regards, Orson Cart.
for 14.6 vout, a 0.8 volt forward drop loses you 5.6% in efficiency straight away.
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