Dedicated thrower is a troll class anyway. Funny to play, but isn't (and shouldn't be) the most effective class out there. Anyway, imagine a 21/15 shielder and compare to a 21/15 shielder with PT investment
Without reading the whole thread, this.
Throwing is an addition but shouldnt be played as a class itself. You should always take a melee weapon with you, simple thing; you cant lose your melee weapon, but there is a limit of how many throwing weapons you can have.
Best are javs/jarids/throwing axes and war darts. War Darts are really effective, simply because one stack has a good amount of them. They do medium pierce damage so they 1hit if you head the enemie's head. They are not too strong because really no weapon should 1hit anyway unless its going to the head (archers headshots onehit, melee hits to the head usually 1hit as well, depending on the head armor, lances can couch, crossbows are sniping weapons anyway, so that is really balanced).
I really like my 18/18 build currently. 4 or 5 PT (or even go higher to 6), enough wpf for most throwing stuff, enough wpf for my 1h sidearm, 6 shield skill, 6 PS and 6 ATH. A good hybrid at level 30, on higher levels even better. Best with war darts.
Horse Throwers need some love, not only due to upkeep.