well, in oly u can beat every class, period.
i was hero (clanless, no feedeing), the mirage has good magic abilities and if u use the wind blast it makes great damage! also if u can debuff ur opponent hes nearly dead, u can debuff everything, unless hes a buffer/healer.
try to enchant ur skills as much as u can and u'll see u can own very easily
its good for farming, u just need to take a puller and the merrow does a very nice job with good buffs. In normal pvp, full buffed (COV/POWater included), mirage can do a good clean up on the enemy lines, also merrow can do that if u catch a group and they all just fall like small flies
the magnus...well...its kinda hybrid, how i use to call it. He can deal pretty nice damage, but his skills are the key to success. He has nice nukes and its pretty usefull in normal pvp if ur out-numbered.
then u get the seraphin. Well, everyone knows what he does and what he is better for. 90% players will preffer his buff instead of one more DD, soooo, stick with fighter if u want some pvp points
so, basicaly, u just need to know how to use it, when to use skills, when to attack, when to bring it in, whne to stop, etc u also have good casting speed, which gives u some advantage on healing him. u just need to coordinate the pet with yourself, the enemy and the situation, always buff him, remeber, he is more important than u, bcoz without him ur a big ZERO
about pvp and farming thx
. WK is the only one who haves mage/warrior bane....ES haves only warrior and PS only mage but Wk is good at party with cat buffs 
this was really good thing