Tetele this is not a server u can solo. Well u can, but it might take u a year to reach the higher levels...
If u really dont wanna run two windows then just do a summoner. Its the only class that could get by.
Also, this is a 15 year old game, i refuse yo believe ur comouter cant handle two windows
A dagger, especially with no buffs, will probably make u quit the game by around level 50...