250k shield with 2 charges on a 6 sec cooldown?

why is flowing strike so out of balance with other classes? a essence on barb which takes the shoulder slot only gives a 25k shield and is on a longer cooldown? what kind of balance is this?

Health is compressed in bg + strife nerfed magic attribute on gear. Im @ 8k res, with 4 pieces with the shield attribute will get u 70k ish out of it.

When u see big shield on players its because of the rotation (multiple skills + green)
Mountbank for me is about 120k shield, breaker pants ess is about 60-70k shield + 70k from flowing strike. (These numbers are based on my toon @ 8k res).

You can actually go into bg open the skill page and see the nerfed number. Anyone that tells u its 250k in bg probably has no clue what they are saying or just repeating what other are saying without checking