I find that fletching would be a worthwhile thing to make for f2p. Obviously only up to what the f2pers can actually utilize. If you truly think about it Mages can runecraft almost all of their runes for most of the useful spells (though giving them the ability to craft chaos runes would definately be a plus), smiths that are suicidal enough to run to the runite spawn in the wildy and/or rich enough to afford tho buy runite ore can craft their own rune gear, and rangers can craft their armor. Accepting that it only seems logical to give them the ability to forge their weapons too.