QUOTE (FuelDrop @ Mar 31 2014, 08:27 AM)
I suspect that it's more complicated than that somehow. it usually is.
The math here seems pretty straight-forward. Talking purely about the question asked, the relationship between dice-pool and limit, limit x3 is going to be the sweet spot, given you are rolling d6es and want a 5 or 6. Dice beyond that will be less useful. Everything else I can think of is really a question about dice-pool size - for example, if you regularly face dice-pool penalties, more dice is better, but the end number still wants to be 3x limit, sweet-spot-wise.
If you want a table for the declining utility of dice after limit x3, that I don't have, sadly.