Firstly you do not want any MVP 1-hitting you, even on the best equipment for MVPing. Do you? You have a party of ~15, and it just kills every character in 1 hit. No for "abused" skills. Very powerful, but survivable with proper alertness and gear, yes, abused, no.
Second, that's why all those skills are put for the MVP. To have multiple classes required. That makes killing the MVP need a proper party, and communication. Blocking Dispell and Coma, yes, GTB, but that makes you more vulnerable to it's normal attacks, being you can't wear Alice shield, so get a Pally to take the damage for you. Sanctuary and AoE spells? Take a prof with you, and keep up Land Protector at all times. Any seasoned MVPer FCPs regularly, so put all the break/strip you want, for those who are unprepared, but that makes having a Creator a necessity. Got more ideas for other classes to be useful? Please, do share.
TBH Naght Seiger was a bit disappointing when we got there, but I enjoyed playing a champ, with ygg leaves. I just snapped and resurrected all my dead party members.
I agree with this idea, BUT, please do it within bounds of reason. And no more arguments about people not knowing anything and countering everything a person might say, 'cause I find it all childish.
1: "Put this skill and this one"
2: "Then use this and that, solved"
........silly, no? Mhm... I'll stress again on multiple classes working together because that's what I want to see. ;)