Don't use them in parallel, as you can't guarantee that each diode will receive an even amount of current. Even if it worked properly, the AMC7135 can only sink 350mA, so divided four ways would be only 88mA each.
Just buy one of Dr Lava's Microboost drivers, set it for 250mA, and connect it to the four laser diodes in series.
While that would work, FML raises a valid point.
It's easy enough to distribute current equally through the parallel diodes. A resistor in series with each diode.
That would not distribute the current evenly. Only voltage will be evenly supplied across them.
-Tony