I’ve been playing a lot lately as I want to heavily test all 0.8.5 sounds before send to you, and I think some more units should be floating (meaning that they should be attacked by all kinds of fliers and possibly “walk” on water, blood and lava). You are the experts here, so this is up for your discussions on unit balancing:
All plague’s eyes (including Eye of oros), undead skull, naga, wraith, shadow, reaper, air elemental, water elemental, sword of light, wisp/ancient wisp (like eagles, they could run away trough water and rebuild their bases on islands), banshee and sylph.