I liked two illustrious checkpoints shared here, SilvermoonMix01-Illustrious 1.1 and illustrious_pencil-XL 1.1, but had some minor gripes with the default styles of both, so I tried a very simple 50-50 merge between them and was pleasantly surprised by the result. Seems to have gotten rid of the lighting quirks of pencil and face quirks of silvermoon, though both of these might just have been skill issues on my part. I decided to share, since it's possible someone is looking for the same results as me. I've done very little testing overall, but this should still retain the prompt comprehension and artist and character knowledge of original Illustrious.
I can recommend the following settings, but feel free to experiment and follow your heart:
28 steps 4 cfg euler a - align your steps
positive: masterpiece, best quality,
negative: bad anatomy, bad hands, error, extra digits, fewer digits, censor, sunlight, bright
Illustrious seems like a good step forward for local 'illustration' generation and I'm looking forward to many more merges and finetunes in the coming months.