If shinji does not know them, there are lesser spell versions of the spell. There is like a 1st or 2nd water creating spell. But this Shinji was ahead of his grade level when it came to charms, he should know them.
Yin idea is good. Modify time!
[X] Fight to the artifact. Cast Aqua Eructo and then unleashed his water ofuda so that they have water to draw from. Follow up with the ice attack Glacius Tria. Pour Yin into the attack. Try to focus the opening attacks onto one Golem to take it out ASAP. From that point, use Shinji's speed to keep kiting the golem(s) while striking with his yin charged scythe and keeping up his water/ice attacks while absorbing fire attacks with scythe.Edit: So there is another plan Daiki and me talked about on IRC. Which foregos trying to fight the golem in favor of trying to rush to the articate in the hopes that getting it will reset system and cause the monsters to deaggro.
[x] Use the Fade Potion to get passed the Golems and reach the artifact.
I will go with this simpler plan. Worst case we die and then try the other plan. But if it works, then we keep Elesa from getting more ticked by continuing to fight the Jinns any longer than she has to.