They are a bit more difficult now. If you're wondering what's changed with them, it seems like they all had their health reduced by about half, BUT, they now have a buff (Elite) that reduces all damage they take by half. My guess is this was their response to the Life Exchange strategy. Their power has been buffed as well.
The first one I came up against was Dos-Ryga (the fish in Kun-Lai Summit). The normal team I use here got completely dominated here, and it really surprised me. I knew they were getting buffed, but I didn't expect it to actually be that much harder. The combination this one has with the half-damage buff and his heal is brutal. I switched up my team just a bit and went with a Gilnean Raven with his combination of Call Darkness for the healing debuff and a heavy hit with Nocturnal Strike. I was able to take him down with that and a couple moths with some heavy hits.
Going up against Nitun, I kind of knew what to expect. Even so, he opened with a Prowl + Ravage combo that nearly one-shot my first pet, then the second hit from his Ravage finished it off and the heal completely voided all the damage I had done. Luckily, my first pet here has always been an Alpine Fox Kit, and I was able to put out a Howl which let my Flayer Youngling take a huge chunk out of his health. Then when he was about to use Ravage to finish off the Flayer and heal again, I used Reflect and was able to finish him off.
Ka'wi the Gorger didn't pose too much of a problem.My Alpine Fox Kit got in a couple Howl-buffed Bites to start out and when he died my Widow Spiderling hit it with Brittle Webbing, which is pretty good against the Moth Balls, followed by Spiderling Swarm. Flayer Youngling was able to clean up no problem.
I thought Lucky Yi was going to be more of a problem than he was, with his heal. I used the same team here as with Ka'wi, Alpine Fox Kit, Widow Spiderling, and Flayer Youngling. Flayer Youngling is really good here, since he takes less damage from the only attack and heals a bit on top of that.
I took Greyhoof down using the same strategy I always have. Tranquil Mechanical Yeti hits him with a Supercharged Call Lightning then beats him with his Metal Fist until he dies. Then my Clockwork Gnome picks it up with Build Turret, it's gimped by the Elite buff, but still seems worth it. I didn't even have to use a third pet here.
Skitterer Xi'a wasn't that bad either. Flyers seem to be my most shallow pool of 25's, but I have a couple moths I like to use. Moth Dust hits really hard when it actually lands, and they can soak up some damage with Cocoon Strike.
For Gorespine I had to change up my whole strategy here. I used to use my Tranquil Mechanical Yeti's Lightning Storm here. The extra damage Gorespine would get from his bleed plust the storm damage was more than made up for by the huge hits my mechanicals would dish out. With the increased damage I'd seen thus far though, I didn't think this would be the case any more. I still used the Yeti here, but skipped the Lightning Storm, Supercharging his Metal Fist instead. This was able to soften him up enough that my Darkmoon Tonk was able to finish him off with Ion Cannon.
No-No was another I had no problem with. Using my Yellow Moth I was able to hit him right away with Moth Dust followed by No-No putting up his dam followed by Dive. I just passed the turns waiting for him to break his own dam which brought Moth Dust off cooldown and actually put him to sleep. I admit I probably got lucky here.
Ti'un the Wanderer was one I was actually dreading. The Elite buff coupled with his Shell Shield was not something I was looking forward to. For this I just tried to power through it as best I could with two moths throwing Moth Dust around for (I hoped) enough damage to outlast him. When he gets a Pump off, it's goodnight for whatever pet you have out. Brute force is what I recommend here. Powerful moths and try to get the Cocoon Strike up for the Pump. I finished him off with my Gilnean Raven's Call Darkness + Nocturnal Strike.
I could see Kafi being a real problem sometimes. If he manages to get a stun, that's probably game over. He didn't manage it against me, luckily, and I took him out with just my Tranquil Mechanical Yeti and Clockwork Gnome.
I've always just taken a brute force approach to the Beasts of Fable, and that still works, mostly. The ones you have to watch for are the ones that can heal (Dos-Ryga, Nitun, and Lucky Yi), Ti'un (even your large hits seem pathetic with his damage reduction, and his pump is LETHAL), and Kafi (if he manages a stun).
Sorry, this ended up pretty long. I hope it can help someone.