Leaving out any oil or interference problem: the smallest possible adjuster has the highest rocker ratio. No threads at all is best, but you need some adjustment somewhere.
The actual distance from the rocker body to the adjuster ball or cup is what matters, not the threads. The number of threads is only important in that the adjuster is more likely to break.
However: it may push your geometry over the cliff.

Every time someone says "use lash caps" I get a headache.
I'd ask everyone who doesn't understand this to refrain from commenting - but everyone knows I'm not talking about them.....