The beauty of PT8+ is that you can throw back everything people throw at you (including lances). And as you go around on the battlefield you'll find plenty of axes and javs (I still prefer starting with the strongest , the jarids, then downgrade to what people throw to me)
Pure throwing is fun , I have 30 STR pt 10 but the problem is that if you dedicated too much on throwing, once people with shield (or if you get sneaked on) get in range to attack you, it's very hard to switch to melee with a throwing weapong and fight (except if you go 2h polearm build and use lances like many started doing .. very HIGH upkeep, and no shield so then again , archers and throwers will pick on you since you'll look like an easy target).
If you're the last guy standing, your chances are very low. Pure throwers usually team up with someone and do their job ; support. You can't really rush with a pure thrower and you tend to stay behind and wait for a good opportunity..
Based on that , if you go hybrid , you wanna try to reduce your weaknesses and try to get at least good and average at some places , not just very good and very weak somewhere else...
So I still recommend 1h shield so that people don't target you right away and go with more skills toward 1h than throwing. If you get 8PS/PT you still can get 4 shield 4 Ath. and 4 WPF to get 120/88 1h/Throwing , making you hard to kill in close combat, and archers can't spam your shield and break it easily. Throwers will mostly hit your shield even though you're already throwing...
If you're not comfortable with a build, change it ... don't force yourself to play a way you don't like... so even though I think 1h is better , you wanna play 2h ? go for it if it's already in your mind ... 2h hybrid are very good too , we're just discussing the fors and the cons ;)