So let's talk a bit about barriers guys, we have 3 categories and those are Manual, Auto and Barrier break.

Barriers can be very useful especially for the buff that they provide and some additional bonuses, as well as destroying your enemy barrier making them lose their buffs.

Manual barriers:

Manual barriers can be great if you have lower initiative than your enemy and you want to overwrite their barriers, the downside is that all of them affect only your lineup therefore it won't buff any of your teammates in GNW/Bond Arena.

One more downside of them is almost all of them aren't prompt therefore you need to wait out for standard attack of your ninja for it to be activated.

Also the positive side is that you can renew them, unlike auto barriers which expire after 3 rounds.

Ninja that can make manual barriers:

-Sasuke (3 star) (Lightning barrier 40% atk/nin)

-Anko (Fire barrier 40% atk/nin)

-Haku (Water barrier 40% atk/nin)

-Yamato (Earth barrier 40% atk/nin)

-Jirobo (Earth barrier 40% atk/nin)

-Gaara (Wind barrier 40% atk/nin)

-Hashirama (Konoha barrier 40% atk/nin)

-Itachi (Barrier without buff, increase dodge of himself and gain 100 chakra)

-Shark Kisame (PROMPT manual barrier without buff, no one in field c*e mysteries for 1 round and summons 3 sharks)

Auto-Barriers:

Auto barriers are most viable for damage teams because they are casted right away at start of battle and don't waste a standard attack from your ninja.

Problem with them is that you need to have more OVERALL INITIATIVE (pos1+pos2+pos3+pos4 combine all 4 ninjas initiatives to count it), if you have less overall initiative than your enemy (and he is using auto barrier also) then your barrier won't be active.

Also any manual barrier can easily cancel the auto barriers in round 1, but on the more positive note a lot of auto barriers have extra effects also.

Ninjas that can make auto barriers:

-Kazekage Gaara (Wind and Earth barrier 40% atk/nin)

-Onoki (Wind, Fire , Earth barrier 40% atk/nin)

-Shisui (Wind , Fire , Lightning barrier 40% atk/nin)

-Danzo (Fire and Lightning barrier 40% atk/nin)

-Darui (Lightning and Water barrier 40% atk/nin)

-Mei (Fire and Water barrier 40% atk/nin)

-Edo Haku (Water and Wind barrier 40% atk/nin)

Barrier Breakers:

Only a few ninjas currently can break barriers, it's useful to remove the enemy barrier this way but I do not recommend using any barrier ninja with a barrier breaker ninja.

I did testing and the barriers won't improve the damage of barrier breaking mysteries (can refer here:

https://forum-narutoen.oasgames.com/page/show-post-29699-1.html

Ninjas that can break barriers:

-Roshi (Round 2 mystery break)

-Tendo (Round 1 mystery break)

-Edo Hashirama (Round 2 mystery break)