Ok, let's say there is an ability that allows you to roll an additional die -1 when you roll the maximum of any particular die, for weapon damage purposes.
So, if you roll 4 on a d4, you get to roll an additional d4-1 and add it to the original roll and that is your damage for the strike.
What would be the equivalent direct bonus enchantment (+1 to +5) that would work out to the same damage range?
Extended, what would be the equivalent direct bonus enchantment if the second d4 roll (modified by -1) rolls the max on the die resulting in +3 to damage) is able to be rolled as many times as is possible (basically until you don't roll the maximum on a die). What would be the equivalent enchantment bonus on this "greater" version of this ability?