As far as outright killing its not many. Mostly shooting armies that tend to do enough to finish the unit off in battleshock. Our meta is a bunch of lumineth with either 40 sentinels and teclis with spellportals for his nukes, or 80 sentinels and no teclis. Then we have a couple KO players with their shooting. 1 guy does really well with a gunline cities of sigmar list. Lots have been able to cripple the units though. Dok boat combo with double tapping snakes and a turn 1 god morathi charge, One guy plays the all in t1 goregrunta charge list. Another guy plays double rogue idols. Some IDK alpha strike lists and some OBR with 2-3 crawlers that can kill the heroes and make the skinks pretty bad.
Fangs has always felt rough to me, because unlike DT, I cant deploy out of range and keep my buffs. All my stuff has to be close together to work, and I have these big 40 man units that are not always able to deploy easily around the terrain we have. So I kinda feel forced to either deploy on the line and take it to the chin, then hope whatever is left can get the job done, Or deploy so passively that I give up a huge early pt lead that I lose even if I eventually table the opponent. I know some people like to take the extra command point, so that on turn 1 they can keep at least 1 unit from getting battleshocked to death, but then you are left with like a 15-25 man unit of skinks and that is still a huge blow to damage output.
This is part of why the birds excite me so much. If I have to deploy cautiously, I can run the birds onto objectives so I dont sacrifice as many points. Against aggressive melee armies I can deploy on the line and not worry about getting charged because the birds will sacrifice themselves to stop it. It really feels like a great addition to the army.