To be fair; Rylais and Protobelt are going to have a rather healthy "rivalry"
Both are low Cost "Core" Items for certain champions, providing on spell slows or mobility. With both being rather slot "inefficient" come late game champions are going to have to choose between getting either Rylais or Protobelt if they want to achieve their late game fantasy; Meaning they'll have to decide which effect benefits their kit more; A low CD dash will be great for those flashy engage spells like Slicing Maelstrom or Summon:Tibbers while Rylais will be better for the sustained damage dealers who need to stick rather than get ONE big burst/spell out as soon as possible.
It's actually a great way to balance the item niche and make champions make a conscious choice.
I'm actually totally fine with that tbh.
or
and a ruby or sapphire crystal. With about that same gold you'll have
which adds some nice burst to your autos and maybe play a key role in your burst combo.