Wyches with haywire grenades will solve your rhino problems. Rush up in raider, jump out and assault, ensuring you surround the rhino so there are no escape points, then hit it with haywire grenades. on a good round of assaulting, you pop the rhino and the troops inside can't get out, therefore they die.
Venoms solve long fangs.
You can also pop rhinos with blaster, and if surrounded by wyches, they are still dead if you force the riders out.
DE despite the internet opinions, are quite effect against Space wolves. I've played 4 different wolves players and have not lost yet. One of those was a guy who ran 10 thunder wolves and double long fangs. Splinter weapons are your friend with 4+ to wound anything.