1H + shield is definitely viable. Problem is it costs a lot more to keep up with 2H users as Atk shields cost a lot. Plus for future Paladins there is the problem of your ACB range which depends on weapon length , 2H being longer.
As for your AP, cap your dex at most at 30 . Now even 50 dex is high. Personally my DEX is capped at 10 but many are now capping theirs at 4.