I know very little about spellwork but I imagine that if you are concerned about the results of this spell, then maybe it is not a good one to try out. I may be wrong but do bad spells return on the caster three-fold?
However, I do not know of a spread, but I am sure one could easily be devised. Maybe you could start with the first card as where you stand with the spell and send it off into two forks, tracking how it would result should you use it and how it would result if things were left to their own accord.
4**********7
*3********6*
**2******5**
*****1******
The 1 would would be where you stand now.
2-3 could be the results of using the spell, the 3 being the outcome.
5-6 could be the results of not using the spell.
Looking at the two lines could determine which course of action would be more favourable. The 4 could indicate whether it is a bad idea or not.
Of course, as I said, I am quite ignorant about this kind of stuff, so hopefully someone who casts spells regularly can help some more.
Best,
LB