I would never thought that Warlord would have an exp problem, but for some reason, i am with tallum plate and common tallum glaive, and at lvl 70 and I cannot make a "train" in mrtyn for example, I made very small damage and if I use skills my mp goes fast really done. Where should i exp and how ? Should i kill one one mob? that`s also damn slow.

Do you have buffs?

go for sth that doesn't have strong pdef
u can lvl well with 1 mob at a time too, u got a great crit dam toggle and a power crush, don't forget the detect weakness skills

u should go for either group mobs or mobs that are pretty tough but easy to kill, nevertheless there's always a way to lvl, just now u can even go to hs and with detect animal/insect/plant/beast u can do some nice farming there, hell, even trains if u're good[i did trains there with OL so it's not that hard]