After some thought here, I think I need to change my vote to [X]His scythe - use flow-walking to get in among them and reap a harvest of blood
Its not about what is the coolest action or what we would prefer on working on but what is the most effective counter to wizards. And that is for the most part, their lack of close combat skills. I can get behind this or the pertfrication spells. This does not seem like a good moment to throw Ofuda around as it is a good force multiplier but does Shinji really need to waste his hard made ofuda here? On these scum? Come on.
And yes at some point I would like to unlock Shikigami but that not likely to be top priorty to me as there is just so many things that Shinji needs to work on after this island adventure.