Enough with the Mictlan already
.
You could try to take a single level 9 bless(F9 or W9 would probably be best) and head straight for destruction.
Even when berserked, a Palankasha with destroyed armour has what, about 7 protection? At that level, your sacreds, mages, archers and light bandar stone-throwers will all rip them to pieces.
Destruction, being at level 4 Alteration, is easy to reach and should you start right beside Lanka, you have Earth Meld at level 2. If you take alteration 1 level further, you can even make your Yakshas into thugs.
The astral Yaksha in particular are useful, particularly since Lanka has no national astral mages(not even via randoms) and rarely has an awake/dormant pretender.
With invunerability, body ethereal, personal luck and possibly resist magic/astral shield they are very tough and the awe takes care of makarta. After Alteration 4-5 a 3 point dip into conjuration is worth-while for summon earthpower, both to provide thugs with reinvigoration and mages with extra power.