I use Leca as a standard medium for Phals (not S/H style growing) just plant in it and water as normal.
In my temperatures S/H keeps the roots a bit too cold for Phals, but the Leca works well in the same temps if not always wet.
I grow other orchids in Leca as a S/H medium, mostly oncidium types and a Zygo. I grow a Catt in it as a standard medium. I find it works really well for me for both watering methods.