That seems a bit odd to do it that way, in any event, would be nice if something like that was in the helpfile.

However, I still doubt base 3.

http://forums.carrionfields.com/dc/dcboard.php?az=show_mesg&forum=31&topic_id=55909&mesg_id=55914&page=

This guy had worse spells, not a leader and did it at 107/123 hours and got 33%.

I checked about 13 rolls with correct items, average roll was 58 with a Stdev of 13 not including the 67 hour Spectre that got 5% or my 3%.