i played a spear hybrid and i can say that it really rocks with good gear in pvp i could kill most of the glaviers and pure ints at my level (bladers are always a pain in the as tho

).. and pure int spear is definetly not the build for 1vs1 due to low defence but it still deals very good damage... and s/s nuker is a build i played too ,if wearing armor it has real nice defence against phy. builds and shield comes handy against other nukers(block rate 17+ ftw ^^) so i say hybrid spear or s/s nuker is good for pvp from the builds you said....
but still building a char only considering pvp isnt wise IMO.
hope i could help..