It sucks that long-range mages have no anti-magic options since Abyssal is a trap
Lux, Syndra, Xerath, etc., can't really get any suitable defenses against magic assassins because getting HP/AP items is shooting themselves in the foot, and without HP an Abyssal Scepter is trash.
You could say "Don't get caught", but some magic assassins like Ekko will just make safety-style gameplay a laughable concept. How does one "play safe" when your enemy can dive you from over a screen away?

lol
to provide you with base survivability
into any of it's upgrades to make it stick.