Some advice against Cryx

Against cryx, you don't have to rely on armor cracking, mass infantry removal, things that remove from play, situationally magic weapons, and accurate attacks are what you need. Anything that can knock them down to help you hit, anything that has a naturally accurate attack like toughalos or champions, Guys like Madrak 2 and his feat, will have a field day with most cryx lists.

I play cryx as my main army, and trolls as my secondary army. Cryx probably will get the alpha strike on you, and are good at getting into places you don't think they can. They can mitigate terrain easily with a slew of abilities and often ignore your guys and free strikes when moving into position. But anything kills them. But that is okay with the cryx player because the only piece that is not expendable to him is the warcaster and 9 times out of 10, their game plan is to get their caster on yours, or land a good debuff on your caster and put him in the ground.

Denegra 1 - a real ball buster, easily swings trolls high armor into something her gun lines or whatever she brings (she really can run anything well) into the dirt. If you can ignore stealth, you will make her play way back to avoid getting shot. The grims have a lot of game into her. Tie up her arc nodes or destroy them, force her to get close to use her very powerful spell list. Weather her feat turn. It is usually an uphill fight against denegra, but a stealth ignoring warlock with a nice long range attack can keep her really honest.

Skarre 1 - powerhouse. She can turn even a lowly mechanithrall or 5 into murder bots that 2-3 of them can drop a heavy on her feat turn and she can turn her entire horde of dudes into very accurate monsters. Lots of infantry removal is key here, and she is still the weak link in that list as if you leave her with even 3-5 guys, she can get it done. She has no way of protecting herself, will probably be taking shield guards. My advice would be have some infantry sweepers (scatter gunners, fire eaters, mountain king? maybe not, too many points in one basket against her) and try and plow to her. Taking her out is the win scenario, she needs to play midfield to get the most out of her spell list and feat, and she will have lots of focus from her focus factory (an additional +1d6 each turn).

Goreshade 2 with all the banes. That is getting a lot scarier with the CID changes coming to banes and the bane theme. Cheaper, more powerful units. Again, just killing the guys doesn't mean a whole lot to the caster and the banes will kill what they touch. Warriors hunt heavies and they are very good at it. Apparition can increase the normally slow bane threat ranges and dark shroud will pretty much negate the stone benefits. Tartarus will fix accuracy problems. So I would recommend killing tartarus and maybe bringing something along like wrong eye and snap jaw for star crossed, it really makes banes cry. Mass infantry sweepers will help or just a bunch of mooks to tie up the banes while you get a bead on goreshade. Except goreshade doesn't need to be anywhere near the fight like skarre does. A smart player will keep him back, I always like to move him up to use his ice sword (because its awesome! autostationary dude) and I get him killed. You want to kill tartarus, unit attachments, bring things that ignore tough (band of heroes may be good in this matchup). Use the bane lack of accuracy against them.

I've also used Grim2 as a cryx drop, but in PoD theme. Admittedly this was not against blast immune stuff, but did handle most stuff that I have seen reasonably well. Grim should look to take out valuable CA's and solos to reduce their lists effectiveness. Or use bloodlure to increase the damage output of his beasts. With tough and 8's to wound, you need to hit the banes with a mortality before you start lobbing bombs at them. Also the banes only get 9" threat, so you should get a couple of rounds of shooting at them. The trap that the pyg drops can help against raiders as they are taking auto Pow10's. I do think the knot is pretty much an auto-include with Grim2 because you really need mortality to land a lot of the time, especially from the runebearer so you are not exposing Grim as much. It also helps the odds when going for ranged assassinations. The Mirage earthborn was a threat that a lot of cryx caster have to respect, even after a trample, still has 3 fury to buy/boost. My list was:-

Grim2
Runebearer (free)
Bomber x 2
Mauler
Earthborn (Mirage)
Swamp troll
Bouncer
Welps (free)
Janissa (free)
Min Stone + CA
Knot

Yes true mortality help for blast, i didn't think about it, i will try this. WIth grim 2 in PoD it may be more hard to trigger mark target, isn't it ? My list in theme has better match ups against dude spam, i would play an another PoD list with this pairing.
What do you think about horgle 2 to set on fire banes and satyxis ?

What do you play with gunny ? Because u have nothing for the stealth, satyxis raiders are immune to blast and banes are resistant to this.

Yeah, you are not getting much work out of the feat compared to a more infantry build. You can always use a melee beast or one of the stone scribes to mark the target if you really need it. I like to still have a mauler and the knot. I've played Grim2 without the knot, and have missed a really important boosted mortality. That can often be game over, or at least a much more uphill struggle. The mauler is really fro rage on the bombers to let them trade against other heavies. But it also lets the lights both hit at P+S 18 once you add Stone CA, mortality and rage, hence you can trade them for heavies, especially ones that have been softened up with a bit of shooting as well.

I have not yet played horgle2 yet (still in pieces on my painting desk), so I cannot comment too much on his practicality into those sort of match-ups. However, my other main army is protectorate, and although it might be conformation bias, I always worry about relying on fire rolls going your way, especially from potentially scattering bomber shots. That can definitely not work out as well as you hoped.

Beasts and doomy2 into denny should be good, as minuses to speed no longer prevents charges and with the threat range that doomy's feat and Lanyssa can give a beast, you should have no problems...unless you run into incorporeal spam like ghost fleet. But against the revenant crew, the RFP would be really strong, especially with a berserking rok that can also move to get into better positions between swings.

That is right, my bad. RFP prevents berserk.  Though I am not 100% sure about the snacking, I think you can use it now if you are not injured.