Can confirm this deck works well. I don't have a 3rd Riryoku so I used a Rising Energy instead and it worked just as well. I also don't have Big Bang shot but I still was able to hit 10k LP damage directly.
I'm also happy with this deck and will attest to the average 6000-7000 duel assessment score as long as you do it right! To the admin of this site please UPDATE Ishizu farm deck with the deck posted above by an anon! Don't be lazy!