Surviving zed ult... zed vs zed

Ok so recently i have been playing against zed in mid lane and well most of the times he ult me then i ult him and then we both die. But after my last few games i being thinking When zed pops his ult, he becomes 'untargetable for 0.75 seconds'. Im thinking that when enemy zed ult me, could i ult him on the last second of his ult, rendering me invincible to any damage for 0.75 seconds. Could that act as an 'temporary Zhonya' for me?
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