If necessary at any point use potions or stoneskin. We keep 1% hp/mp (Rohan Gold) drain on our dagger it's not much at first, but on some the of the later AOEs we get huge returns. Some people will tell you to just use a full out hp/mp drain sword but this is unnecessary. AOE hp/mp drains seem to be broken, at least on assault crash. If we get enough mobs, even without OS we get drains of up to like 1300 health and mana, when we deal around 1300-1500 damage to each mob. With 1% drain that would take a
It is very nice in Rohan, especially later in OS when we are shelling out 4-5k AOEs at a time. We also never use mana pots like this, and rarely when we need health pots unless we take a barrage of damage early in our OS. We can only imagine with a drain sword and like 8%+ drain how excessive this would get, if it works the same way.