What is it ?

This is a mod which aims at adding new and challenging illagers to encounter in the overworld and during raids.

What does it offer ?

New illagers to play around with in raids, which can also spawn naturally in the overworld. The mod also adds a few illager beast type mobs (similar to the ravager), which can also be tamed and brought to battle.
It also adds new materials and illager costumes which is quite nice.

In terms of flaws this mod has quite a bit of them :
The Blade Knight is basically a strong damage sponge , as he is not that interesting to fight and requires taking a lot of hits to kill which is really annoying in raids , and some of his abilities are awful : he can teleport you to him (which would be fine if he wasn't so resilient) and he can increase his stats permanently after mobs die around him (which is bound to happen in raids as villagers or illagers will die while this guy is still alive).
The beast tamer is also very infuriating , especially when other illagers are around, because sometimes he shoots arrows which give a potion effect preventing healing of any kind, which is too deadly even with full netherite enchanted with protection IV (and that is without taking into account the fact that he also always summons a dangerous beast which fights alongside him).

Aesthetically speaking this mod's mobs look pretty bland with the exception of the Blade Knight , and I have even noticed they have inconsistent textures : for example the beast tamer clearly has the 1.14+ texture style while the scavenger have the pixel art style of the programmer art textures from 1.12 and prior versions, so much so to the point I am questioning the origin of the art used in the mod. I have seen the Scavenger slide on the ground during a raid more than once I am not making this up it had little to no animation at all.

In terms of performances I haven't noticed any problem, that said many report crashes even in the latest version of the mod in the comments under the mod's original curseforge page, so this tells me this mod is likely also impacting the game in term of a lack of stability .

In conclusion

This mod adds in a few illagers to raids, but they are too challenging to the point where they are really unfair at times.
Unfortunately, this mod lacking a config file is a big con for it as some of the mobs are so hard to deal with that you can hardly combine this mod with basically any other raider mod .
For a one off challenge or to fill hordes with more enemies for something more specific it could have a use , but it is still a very bad mod that I would not recommend for any serious modpack.

Edit : I would like to mention that I have recently learned that this mod may or may not get a total rework of its code in the future; if that is the case, I will make sure it gets suggested here and I will review it when it eventually does get reworked/update this review if it is a replacement