Secrets of Angel Forge

Head north to meet Tarkus and collect the beacon, then proceed south.

Make your way to the storehouse, using (cover (press the cover button to crouch behind walls or objects)) to protect yourself from enemies before engaging them.

Bunker bust the tower with a powerful explosive attack to simplify the area.

Once the area is clear, have the Force Commander (FC) capture the building while the rest of your squad sets up defensively around the building, primarily to the west.

After capturing the building, a Looted Predator will attack; use a melta-bomb to quickly destroy it.

Eliminate any remaining attackers.

Push through the Angel Forge, fighting Eldar troops. An ambush near the Foundry is the only significant interruption.

Use the Dreadnought's ranged attacks to defeat enemies and melta-bombs against tanks.

This clears the final opposition before facing Idranel.

Warning: Fighting Idranel directly involves her aggressive offense and reinforcements. Use the Dreadnought to keep other enemies occupied while the FC attacks Idranel, supported by other squads. This method is time-consuming and may result in squad losses; keep aid packs ready.

Easier Method (Potential Glitch): Send your squads to engage Idranel while your FC captures the Foundry. Once the Foundry is captured, Idranel becomes less aggressive, summons fewer reinforcements, and her attacks are less damaging.

Defeat Idranel using your preferred method.