I will admit, I'm one of those people that write up huge wall's of text with lots of details. But I will also say, whenever I do them, I've never had a group that's wiped more than twice. Sometimes you do infact need to see the mechanic to really understand, but it's not that hard to correlate what I said in my explanation to what happened in the fight.

"When you see a big flashy arrow AoE marker above a player, stack on A"
1st time, people didn't get it because it caught them off guard and they weren't near.
2nd time, oh yea, that's the big frickin flashy AoE marker he meant.