Well...I do have a nymph deck and was lucky to get a time nymph card at the Oracle. It is worth 900 electrums exactly, but you can't buy them anywhere at the bazzar. The cards are only useful if you want to get them on the field fast without wasting a pillar, but that's it. If you wanted to, just get a bunch of pillars and a bottle of nymph tears and create a queen to create an army. It works for me, anyway.
Direct to Field is much better, just have to collect the Nymphs from Oracle. Tears can always fill in the gaps tho.