[X]Pick up the sword of light. Order the golem to charge the formation of wizards with the Shadow Sword. The golem will pierce their shield, draining/drinking its mana and causing the golem to self-destruct. Conceal it's approach with some flashbang ofuda. Time the explosion of the golem with a supercharged confringo aimed at the formation. Flow above the wizards after the explosion and lay the area with yin dragonfire. After the big strike, switch to dealing the giants with his dragon abilities and melee with the sword of light.
There is a modified plan of EmperorBR. Basically the same but Shinji uses the sword of light and changed some of the wording.