First of all, how long is a time unit supposed to be? Is there an acceleration of time during conversations? Do time units mean different things when affecting different people/things?
I've been unable to figure out how long the time units are supposed to last, because they seem very erratic. Part of this is because it seems like conversations speed up time, (I can be involved in a very brief exchange of words, lasting but a few seconds, but my bless always expires).
However, I've also been confused when comparing Bless to Polymorph. (level 1 polymorph should only last 3 time units I think, yet it always outlasts my Bless, which should last a whole 15 TU if I'm not mistaken). I very regularly cast lvl 1 polymorph on a tough creature and chase it through the woods for quite a while, trying to whack it as it hops around. I've not once seen one of these creatures turn back into their former selves, (so perhaps it's just a bug and PM is permaneant?).
Thanks.