| Ymmijx |
| 1 person marked this as a favorite. |
i saw a few people talking about this so here's a quick stats lesson.
dropping someone from 50% to 40% is more than a 10% drop in overall effectiveness. the target was only 50% likely to succeed originally and they are now 40% likely to succeed. for a simpler example imagine dropping them from 20% to 10% the action they performed was unlikely to succeed before but now it's half as likely to work. there were 4 of 20 success results but now there are 2 in 20. this is why tanks are a thing. stack 1 person's ac to the point that people never hit them and you'll get much better results than the same amount of ac spread across a whole party. +1 ac party wide is generally a lesser effect than +4-6 ac to one target.
this is a really common issue in how people think about statistics. it's easy to under or overvalue things when you only consider the isolated effect rather than its total impact on the outcome.