Solar brilliance cancels the darkness aura (This also cancels their dark power stat boosts, I don't know if they get a malus if solar brilliance is active, but I doubt it). The Mandeha have a sleep aura. iirc you cannot cancel this, so get as much reinvig as you can. It only does fatigue damage.
Get some demon bells and cleansing water spammers to get rid of the support troops.
General, how to beat SC X advice:
- Try to go for the resistance they are missing. (In this case, the -100% fr means they almost always miss some sort of defence).
- They are large, so they are usually priority targets. Blood has a lot of good anti SC spells. Else, freeze, blind, or incinerate them.
- If they have all resistances, they usually lack combat skills, get a flying anti-sc sc of your own to beat them up.
- If they are demons, get weapons that do more damage vs demons.
Personally I would beat him this way (if the mandeha is kitted and used like I think it is):
- Get a caster to cancel the darkness, by casting solar brilliance.
- Get some demon bells, some cleansing water spammers and cast stuff like heat from hell and other fire spells. (lankan demons have a fire malus).
- Have one
- Ignore the Mandeha. He will rout as soon as the support troops are dead.
- Teleport rudra on his possible retreat provinces.
Of course, this needs one thing, you need to be able to predict which province he is going to attack next, or you need his army to stay still.
Or, if it is a combat mandeha.
- Gear some rudra to be able to defeat the support troops.
- Gear some Yaksha earth randoms to cast petrify.
- Beat the troops to a pulp, walk over to the immobilized mandeha, beat the immobilized mandeha to a pulp.
Even better, combine the two methods above. And always add one s2 caster to horror mark the Mandeha. Eventually the horrors will take care of your problems.
As you probably play bandar log you should have little problems, you have all the magical paths except blood.