I’d have another crack at Spencer, knowing you know more about it than you did before and you are likely a touch stronger too. Maybe take 1-2% off if that gives you a mental boost. I think you’ll get more from ‘beating’ Spencer than you will by tackling Kaiser with a weeks worth of fear baked into it.
As others have noted, Spencer and Kaiser are really, really hard and infact have been swapped out in the latest updates to SSBLV2 to something Coach Chad thinks is more civilized. See here.