My ideas about tactics in this raid:

The group should have 2 healers, and a bard is very nice for buffs.

Everyone must have some way to remove curse on themselves.

It is important to pay attention to the cards Madam Eva gives you and note them.

The items:

The sunsword is crucial, someone needs to hit Stradh with it to debuff him so he takes damage. The thoughest DPS char in group should have it, and only job is to hit Stradh. If noone hits Stradh with the sunsword he will not take damage from anything.

The other two items are clickies to remove Stradh’s grip, a hold spell that will kill after a some seconds. Stradhs grip will propably kill faster on higher difficulties. Limited number of charges, perhaps saved for Sunburst DPS char? Give these to whoever is healing.

Phase one Rahadin:

This is pretty straightforward, just kill things. The hate shadows curse debuff lowers your maximum hitpoints, so can trick you if you look at the bar, not at the numbers. Use remove curse potions as soon as you see you are cursed.
When done go east to Sergei’s tomb to listen to Stradh rant. Rest at the shrine, this is the only shrine in the raid and will not be accessible later.

Phase two kill the heart of castle Ravenloft.

Again pretty straightforward, climb up the spiral stairs to the heart, while killing mobs and disabling traps. The spears do force damage with no save, and they will kill most characters in seconds. But there is a safe path around all spears, with care they are not hard to avoid. The party will be attacked from behind, as well as have to fight monsters in front.

A rogue must be in front to disable traps, and preferably good ranged DPS, the group will have skeleton archers shooting on them.

When you reach the heart the character with the sunsword use it on the heart. Everyone enters the heart, this is a relative small area, with a white mist around it. The mist will kill anyone within it, so little room to move. The objective is to survive Stradh’s onslaught, so just kill mobs until Stradh leaves.

When he leaves continue upwards and talk to Ezmeralda to complete this phase.

Phase three Find the cards.

We must find the cards as fast as we can. Group must be as thight as possible, loners will be overwhelmed and killed. Other guilds use Bigby’s hand to mark where they are to easily find them again. The torches with each card must be used in the right order, so someone must note the order of the cards at start.

Phase four kill Stradh.

Stradh will cast red fog if he is between 95 and 20 % health, so everyone must rush Stradh and get him below 20% health. When that is done, we must kill the brides and Stradh within a few seconds, and the one with the sunsword must be ready by Stradh’s coffin to finish him off with the sunsword.

Loot shinies!