I beet the Factions game on the Luxon side and then Raisu Palace and finally got to fight Shiro at the Imperial Sanctum. Final Killing of Shiro took 47 seconds.
A little known secret about beating Shiro:
The Trick is just that (Beeting Shiro) And your intire group needs to grab Melay weapons and ATTACK ATTACK ATTACK do not stop hitting him from the time you reach him up to the point he drops dead and the cut seen starts. The more warriors you have in the group the better. DON'T use healing spells he will absorb the healing (Hes a Ghost God). Have Monks Only use smite spells, Necromancers Touch Hex spells and there Staffs and wands & Rangers' Use your best Vampiric Bow and use Interupt Skills.
The first 3 Groups I was with all died because they kept stopping and healing or at least trying to heal. Thats when Shiro will use a transport skill against you and send you to anouther Zone.
If you get sent to this zone you'll need to run to the top of the hill through all his ghoastly Minnions to reach a portal that brings you back to the fight, if anyone else is still living when you get there.
Just remember the faster you Attack and Bash the quicker he dies. DON'T LET UP ON HIM for a second.
Good luck!!!
TCB
