New suggestion ;-)
Since liquid Shadow is only useful when you have a dragon I'd reduce it to maybe 5 or 4 Liquids and the purify accordingly.
This allows you to add Cloak and/or Towers. Even Eclipse or more Vampires if you want.
In my opinion it's not often needed to have the combo card as often as you want to play it. There is always something that can destroy your dragon.
So LS is useless without dragon. As well as Purify (except against poison).
So 6 Dragons --> 4/5 LS and Purify --> Gives you 2 to 4 more spaces.
My personal suggestions are 2 Cloaks and 2 Towers or 2 Cloaks, 1 Tower, 1 Eclipse (gives nice heal addition and not purified dragons last one more turn).
What do you think of it?