have tried the "silence" skill, but can't attack back row directly (meaning must kill everybody in front 1st) before can use. Bows help, but Lich's have very high hit points, (so unless you have 6 bows) anything like that takes *WAY* too long! (all he needs is ~ 3 shots [+ the rest doing small dam] to kill 1-3 people. [or even 1-4!]
-->> OH, *SPEED* helpS! (somebody from different post suggested that!) The difference between him using it 1x [that's ~35dam PER CHAR] vs using it 3x [~105dam per char] is *HUGE*! Even 2x (~70 dam) is easier to survive.
Mass heal---help some, but not enough. Usually only 1 person has, & does very little (15-20 compared to his 35 dam) -->> *PLUS*, it's the weakest char (low health) that die quickest. (usually only 2-4 out of 6) Part of problem is, when it's your turn, do you *HEAL* or *ATTACK*? [can't do both] Best healers [MATK] also best magic attackers.
Not sure Paladin (have to face him early---Paladin's one of those you must *BUY* so later on *AFTER* have 500 Guild pts.)