I usually will have about 8-10" of water over my tropical crowns. The pots I've been planting my vivips in are shorter, so I will usually have them sitting on bricks or something to hold them closer to the surface. Some viviparous starts will grow better than others. Blink is a very hard one to get to survive for me but ones like Tina/Islamorada/Key Largo/Hoku Kea do much better. I've got a shallow black pan I picked up at Lowes in the cement department that I'll fill up to put vivip starts in. Gets pretty hot during the day, cools off at night. Been able to grow some viviparous starts in it ok & I do plant them with a pinch of fertilizer. Maybe Craig will speak up to help out with your question.
Lindsey Woods has been a harder to grow lily for me. I think I tried to get 3 different plants of it to grow before I was finally successful in getting one to survive the season. Savannah even gets great success with hers in her mud pond, so I'm thinking maybe LW is one that requires higher temps to be happiest.