If I could make one request for Sylas, ..

I would really prefer that Sylas's ultimate have an adaptive calculation built in to determine that he is indeed prioritizing AP over AD.

If the adaptive calculation would determine that he is prioritizing AD, the AD scalings from the ultimate that he copies (if present) should remain as they would be normally.

IMPORTANT! I am not asking that AP ratios be converted to AD.

THIS IS A DRAWBACK, BY DESIGN.

With this, AP Sylas would generally be the preferred build path because he would have scaling in his passive and all of his abilities.

However, AD, or at least an AD heavy hybrid, would still be viable in the sense that he has a 100% AD ratio with his passive, he can use his abilities (Q, W, and E) as means of mobility, crowd control, and triggering his passive.

In terms of value that his passive provides, consider that the passive portion of Tiamat and Ravenous Hydra only deal damage that scales on 60% to 40% of the champion's attack damage to enemies surrounding the target. The active on Ravenous Hydra does deal up to 100% attack damage, but that is an active with a cooldown, while Sylas's passive has no cooldown and can be triggered after every use of an ability, including both casts of his E.

He would need to be more picky about which ultimates to copy though. Currently, he could still utilize any ultimate that has more value for the utility that it provides, opposed to a damage scaling ultimate. With this change, he could at least get use of SOME damage scaling ultimates.