If you wanna go low shield and more IF go for str shielder, as agi shielder you need more. Its the thing that you wanna be good at as agi shielder. Take several hits and your shield is still perfectly fine? Great, either support melee battles or flank them archers, if they see you coming they will fire at you and start kiting - great because you're drawing fire and your teammates can concentrate on melee instead of dodging.
See your opportunities and keep your shield up.