This is a very general tip and can work in many other cases with Seris. When you hear Drogoz ult and know he will target you (or to be safe) quickly go into shadow travel. This makes you immune to his ult and will confuse the enemy. Be fast, though!
Ruckus can activate a shield, if you are finding it hard to kill him then purchase "wrecker" from the item shop, getting it to tier 3 shreds through his shield.
If you try to dive Furia, you'll get a pyre beam straight to the face. Furia suffers from the fact that her damage is short range, so the further you are away from Furia, the bigger your advantage against Furia.
Talus is a good champion to flank Dredge. Talus can disrupt Dredges flow of dealing damage and stop him from spamming his AoE (Area of Effect) attacks. Talus should kill him if he can but teleporting back to his portal is still ok as you dealt damage