The thing that distinguishes the Requiem Classes from other classes in the LWOTC environment is a high focus on Squad Synergy and role-dependent deployment. They all have a number of unique abilities and some very specialized use cases that all require some experimentation to get a handle on. Once you start finding the uses for the classes that suit your particular style, you'll probably enjoy them immensely - but they all have a pretty clear set of strengths and weaknesses that you'll need to consider, and certain mission types definitely favor some over others.

ARFMWitch_LWOTC

The Witch Class is a Templar Adjacent soldier, a mobile and tricky melee class that is built around the core mechanic of summoning spectral creatures and direct them in battle. They have some versatile build paths, featuring a strong AOE melee attack and a variety of useful psychic abilities - but they are fragile and need to be carefully used to preserve their limited hp.

ARFMScavenger_LWOTC

The scavenger is an incredibly useful and versatile mercenary, relying on the vector rifle and a sword, they have the unique ability to 'scavenge' additional loot in combat. At squaddie, they gain a random free perk from a limited pool that can affect the way you build them, but they can be built as precision shooters and opportunistic combatants, and they make excellent officers and back rank fire support. The real value of the scavenger is the ability to collect a little bit of extra resources on missions, which can help fix a struggling economy.

ARFMTesla_LWOTC

The Tesla is a unique supporting class with a lot of useful tools at their disposal, the Tesla features a unique ranged weapon that can be a bit tricky to get the hang of, but has the potential to be very impactful. They use their own unique "Tesla Rifle" which fires electrical attacks that can arc between targets (and can hit friendly targets), and they can employ a selection of unique gremlin abilities. At the core of the unit is a very effective stealth/scouting package - making them an excellent objective based soldier. They can certainly struggle at lower ranks, as their weapon is tricky to handle and their hack skill isn't quite as strong as other gremlin classes, but once you've invested a few ranks into your preferred build, they can be indispensable.

ARFMFusilier_LWOTC

The Fusilier is an absolute commitment to long range fighting. Almost useless when it comes to General Ops because of the multi-turn setup they require to use their core ability, but on big important missions like HQ assaults, Supply Raids, Invasions, and similar missions, they are incredible. The core mechanic of this sniper/autopistol class is a multi stage sniping ability. The Fusilier must be carefully positioned, and once there, they must remain stationary for two full turns to use their powerful tracking shot ability; but if you can post them up somewhere they have a good view of the battlefield, they can absolutely terrorize the enemy team with huge reliable long range kills. Make sure you keep them protected, because if they get caught out, there isn't much they can do to defend themselves.

ARFMMiner_LWOTC

The Miner is a reaper adjacent explosives expert. They have a very robust stealth package, and some incredibly strong explosives at their disposal. They can be built with a focus on their unique land mine abilities or as very effective mid range rifle shooters, and they also are very effective scouts and officers. The real joy of this class is the absolute insanity of their proximity mine secondary weapon options. The mines are tricky to use at first, as the placement range requires the miner to be very close to the target, and often risk getting caught in their own blast radius. Experimenting with different builds and different proximity mines will create some varying role choices for this high risk / high reward soldier class.

ARFMAspirant_LWOTC

The Aspirant is a very useful support class that benefits from carefully selected squad synergy. They have a limited number of uses for their very powerful psychic abilities, but can be otherwise built as defensive snipers or very aggressive shotgun wielders. As snipers they've incredibly effective overwatch shooter, as a shotgun user they have a selection of strong close range multi-target abilities, but their psychic abilities are where they really stand out in the supporting role - they can save out of position soldiers, throw psychic heals and shields around, empower your front liners to be significantly stronger or stealthier, and they have access to a very strong suite of master sgt abilities that can dramatically change even the worst situation in your favor.