Which board has the highest max current via 3.3v pin?
Your USB will output only 500mA or max to max 1A in some cases. Even if your board is rated for higher output you will be restricted by your source. First step is to increase your source. Secondly check which 3.3V regulator is present on which board and check the datasheet of the regulator to get information about it.
Either ways you can externally add a high current 3.3V regulator and connect it to your 3.3V pin on the arduino. As voltages are equal no current will flow between them.
But remember your source needs to output the higher current first