I don't mind a combination of Izanagi and Eight Gates Released Formation, if the actions are performed correctly and are not messed up in any way. Why? Well, If you need both techniques in order to 'tank' me, then that means I was winning up to the point that this 'trump card' was thrown into the ring.
I always point out that the latter end ups cooking your body, chakra, organs and everything in between; in exchange for a transformation of incredible power. This means if you go EGRF then proceed to waste the turns for this power-up to end, before using Izanagi; it will be a no-go. I mean think about it, you can't waste an eye if it becoming cooked due to your own chakra being enhanced to the point that you'll become ash after the state is over. [Izanagi -> EGRF -> Turn count -> ?]
Camel tried to do it against bocc and it just kinda flopped. If I am remembering correctly. So people just kinda voided it from there based on that.
As for Izanami? Like Rusaku said, I tried to pull this move off and even had a discussion with the alleged person that I actually cast it it--there was nothing but doubt and giggles that I couldn't even attempt to do it in an IC fashion--which to me is all the motivation I need to pull this off. But I pulled it off in five turns and I was actually planning to kill Bocchiere off for good; the guy even admitted that this move caught him off-guard and basically 'good game. well played'
Stupidly instead of going through with the plan of villain killing another villain, I decided to waste a turn brooding with my character and kill him afterwards. This was my mistake, because you see this is SL. Izanami works differently here than it does in the actual series. So this is were the 'flop' came and it was made that all you had to was accept *who* you really are on the inside, thus ending the technique on you. But with an extra change in your character's personality due the conflicts in the time-loop.(think Kabuto here.)
Which is why some are reluctant to perform the technique, after seeing my grand display, lulz. But performing the technique was more of a 'challenge' to me and I can say that I managed to pull it off, but not contain the adversary within it long enough like Itachi did.