You know I kind of have to thank these Youtubers....a bunch of them have been like crash test manaquins. Showing me the kinds of errors to avoid, and giving me ideas of tactics to use. One guy Had Varric shooting at enemies through a window. That was freaking brillaint. Heck he could used Varric to pull the enemy through a minefield of traps, magic and a hail of arrows LONG before they got into melee range with Cassandra.
Heck I can not WAIT to see how the Specializations work with this!
No, no it is not. Those Barriers last a whole 20 seconds. That would nothing with a fight like the Arishok, no matter how many times you cast it. You will likely run out of Mana and Potions before he is defeated.
They've already said you can upgrade the barriers, and that it stacks with other abilities like guard, and that you can recast it again pretty quick.
DA2 had pleanty of "mitigation" abilities, as listed above. You could keep these up most of the fight and it does not change how annoying the fight is. The Arishok fight is now basically going to be EVERY fight in DAI.
That was DA2....this is DA:I which has completely changed how combat works, how the areas are designed, how crafting and magic work, so the DA2 experience doesn't really help to inform how this game will play. I've watched a number of fights in DA:I from people with varying skill levels and none of them ever made me think o the Arishok fight.