I am an archer main so some of these tips will be archer related. But you could get an idea from it and twist it for your own classes.
Revengefold Seven:
Pray to Gabija you get a Dievdirby C3 on your team with Ausrine. Get the Ausrine statue effect and run in with an AOE (broom trap, magic missle, oblique shot) and soak up all the reflects.
On a Scout you could use Barrel to block the reflects but it would take good timing. Maybe a safety zone would work too.
Lastly you can hit them with your weakest auto attack and take weak damage.
Raise
Spam jump and you MIGHT get out if you’re on the edge of raise. Otherwise don’t get caught in it and use reversi, counterspell, detonate, capture, fumigate, indulgentia.
Snipe
There is an audible beep when a musketeer casts snipe. Use your defensive skills right away (Barrel, Safety Zone, Deploy Pavise.)
Hounding
Scouts’ worst enemies. But you can easily Full Draw the pet and it will disable the hunters’ skills. You can also put down an object (claymore, caltrops, pavise, dievdirby statues) and the pet will start targeting that instead.
Ausrine
Hope you get haste and run as fast as you can to the other side and CC them or kill them before they get the effect. Otherwise lag and stall until the effect is gone.
NO AUSRINE FOR YOU!!
Dark Theurge
Cannon Blast has enough AOE and Damage to wipe their spirits and damage the warlock at the same time.
Protective skills (SZ/RX7/etc)
Rush + Restrain
Protective skills (SZ/RX7/etc) and Barrel for archers. You can try to knock back the Cata with heavy shot and cancel rush. This won’t work if they have Pain Barrier.
Safety Zone
Remove Safety Zone: Counterspell, Capture, Detonate, Reversi
Remove player out of SZ: Long Stride, Impaler, Shield Charge, Retrieve, Magnetic Force, Ice Wall, Frost Pillar, Deploy Pavise + Teardown, Swap
Also safety zone does not protect you from CC (Sleep, Freezing, etc)
Mackangdal + Safety Zone
Do as much damage as you can and then remove any safety zones or remove the player out of safety zone.
Broadhead + Wugushi Poison
Protective skills (SZ/RX7/etc), Bloodletting/Prophecy and Barrel for archers.

I’ve seen enough players make the mistake of using all their magic when all players are bunched up, then I join in the fun with a counterspell.
