Well, the debuff "Tidal Bargain" is described as "Volatile energy is building up, increasing your damage dealt but reducing your movement speed. At 10 stacks, the energies will violently burst, dealing extreme damage to you and nearby allies." So the more stacks you have, the less movement speed. On 100CM, 8-9 stacks means you cant move. I usually keep track of the stacks on the party interface, and even on low settings the orb from where the tether appears is visible so I can make a guess on who's tethered(straight line). Water tornadoes can be dodged, one way is(assuming full endurance bar), sidestep first for the tornadoes that come from the boss. Then the ones on the left and right sides(double dodge), then 1 aegis for the last one when near the boss.(5 waves of tornadoes on 100)