evasion/def hack?

i've seen ppl taht i fail to hit all the time...always low dmg with AA (which means miss) and altely un-stunable guys....idk how to figure this out...well...example: in svs there was a guy a sin and 2 elementalists attacked him....first brutal scud missed, then home thrust missed,then both invisible arrows and then the other stuns also...it's not about the lvl range coz the guy(SR) was same lvl as sin and the elems were even higher lvl than him...WTF :S ..i f there is a hack liek this share pls ;)

mb it's commy with AM(Adamant Mind)? xDDDD

lol no it's a SR

Def hack imposble all character params server side)

well i+m not saying it's a def hack i'm asking what it is :P coz it must have smtng to do with something of that