So I'm in Avalon lvl 80 with a full waterworks set and I got killed because a storm boss used 3 wild bolt that did 1k each, why even say it can deal 10 100 or 1000 when it deals 1000 3 out of 5 times? That spell is absolutely broken but luckly monsters don't use it because obviously when a monster do use it his chances to hit 1k look like triple of a players's.
Assuming dealing 10, 100, or 1,000 damage each has a 1/3 chance of happening, having three wild bolts all do 1,000 damage isn't too crazy. It's a 1/27 chance (~3.7%) for that specific order to occur, which is definitely plausible. Matter of fact, it's the exact same probability of a sequence of any combination of damage from the spell (ex. -10, 10, 100 - 100, 10, 1000 - etc).
The only reason it seems implausible and/or frustrating is because it happened to be the maximum amount of damage the spell could deal.