is it ok if i finally put my 2 cents here? i wasn't commenting because i thought that you were decided on rune.. but since you're considering warfare, i figure i'd butt in.. rune is better than warfare maybe if you're strictly for throwing weapons.. but if you're considering other skills warfare could be better than rune mainly because of battle standard and traps.. it would require some farming because you need 70%+ CDR but that is damn strong and you could also mix throwing weapons
now if you're considering using other skills to support throwing weapons, there are other masteries (i think all except defense because shield attack procs doesn't work with throwing weapons).. i mean look at hunting for example, you could go the old bow brigand build just substitute throwing for bow.. and blade honing works for throwing whereas it doesn't for bow.. you have study prey so you could go the piercing way which you said you wanted.. traps are also pets in AE so they benefit from AotH and CotH
now since you have lots of unspent stat points (good thing), you are open to more builds like throwing knives.. here is how my throwing knife caster work
https://youtu.be/5wV3mvWKepo
or you could use knives to just spread confusion and/or RR.. then kill with other skills like throwing.. or go melee so you could finally mix defense.. being tanky with traps and confusion.. but that is not what you want i think