One Weapon At A Time

[League]

Depends on the weapon: the ones needing reloads aren't quite as monotonous, but, generally, they aren't as fast to level as the others are. The Staff is the fastest leveling thing, and the grenades were second up to at least 20 or so till the people started running through.

Pistol and grenades should be gotten up as soon as possible, I think, and the Doll should be too, at least before you get the Staff. The cutlass isn't boring or anything: even if rep was slowed, it could be one of the last weapons. With the dagger doing decreased damage up front, it could either be a) more likely needed to be leveled up quicker, or b) the opposite.

[Poison elf]

As stated already there is no right or wrong way. For me in some things like grenades for example, its what will get it over fastest.

I find it like Max said, to work several things at once, and get rep in all those things, rather than working one for the same rep it gets with/without combining the others.

Grenades have to be the most boring and even working them with other things, you find them way to monotonous. Working just these from start to end not doing something else would drive me more nuts than random degrades to characters.