Well i was thinking of challenge dice and came to conclusion its kinda weaker than it should be.
For example look at the expertise dice.You have 2 boons,success,comet,succes+reroll and one empty slot.And with every rank you get one aditional expertise dice.And on challenge dice you have challenge,challenge,double challenge,double challenge,bane,double bane,chaos star and empty slot.Point is that by exp and rank you cant improve pool with aditional challenge dice for enemy except by improved parry/block/dodge.Than,chaos star should be worst thing you can roll in game and in combat its best thing you can actually roll in like 90% of situations because chaos star when not noted have same result as empty place.My players when rolling are like "Comon chaos star,comon chaos star".That makes no sense.I think i saw in one of posts here that some1 mentioned that as well,that chaos star should have universal result like challenge+reroll,2 challenges+reroll,or challenge+bane+reroll or somethin so it could be similar as exeprtise dice.Two challenges+reroll is best option i think,and as i remebered that guy put it in a same way.
The way it is now its very hard to miss.Rank 2 troll slayer or thug with 5 strength for example after 3 rounds against best possible defence made character have in dice pool-3 reckless dices,2 standard(blue),4-5 fortune dices,2 expertise dices and that all tougether gives 16-17 possible succeses against 3-4 missfortune and 2 challenge dices which gives 7-8 possible challenges.Its more than double difference and take it in consideration its against best possible tank(full plate+tower shield+improved parry/block/dodge).Troll slayer will hit in like 90% situations.Dont even wanna mention rank 3 or 4 with 3-4 expertise dices...
Leon