I’m beginning to think there’s a rule (or at least, general trend) in magick that the more conditions you place that must be met before your desired result can happen, the less likely it is to succeed - whether that’s insisting on bringing in irrelevant elements like every last planet having to be in aligment, redundant cultural baggage (can only do invocation of Spirit X wearing the exact same robe worn 2000 years ago when he was first worshipped), or whatever.
It creates conditionality, and if you can’t meet one of those conditions, or even if you just have a nagging doubt whether you’re doing things “right,” you’ve pre-programmed yourself for failure, for events taking the course they would have done anyway without your will affecting them.
Insisting a result comes via a one specific path is a big condition, therefore, best dispensed with.
Conditionality = bad; believability/deniability (things that could have happened anyway, albeit maybe unlikely, but which a Randi fan could easily explain away) = good.
There are going to be exceptions to this, especially when it comes to direct interactions with spirits & evoking to physical form, but as a general guideline I think it’s sound.