with lawatia there are numerous setups.
the first 3 creatures that i think are useful for openings are: shade, leonardo, skeletal warrior.
shade and leonardo are both throwaway units. leonardo destroys the first unit the opponent puts out (unless it's blitz) and then usually dies pretty fast, which is ok because you have a hand SS card effect and his 2SP back. if he lives long enough to make it to turn 4 then you can use his 50 damage again. either way you benefit.
shade is used exactly like mentioned in the beginning, to get an early SS activated, either to give yourself SP or lawatia levels or to destroy any enemies you encounter.
skeletal warriors is the equivalent of haste soldier and has his pros and cons. his biggest downside is that he can be killed multiple times in the same turn so you could lose all 3 of his cards very quickly. the upside is when he closes he automatically comes back with whatever buffs he had on him previously. magic weapon, SS buffs, anything like that he keeps. This can be huge and i've had some very nice combos working off him, although now i dont tend to play him first anymore.
But openings really depend on the kind of deck you are playing, what your goal is, there are some basic moves like the ones above that are good for beginners and maybe even for veterens, but in the end you have to think of what you want your deck to do and then create your opening moves based on that.
