At its core, aggro is about pressure
While this effect can be disrupted by Iono, it still forces the opponent to make plays that they might not want to, which is why Serperior is an interesting card for the current format
As creatures you can sacrifice to protect your board, this Spider-Man and Boromir should be fairly interchangeable unless you have specific synergies or flavor reasons to run just one of them
Aslla Piscu is my favorite Earthbound Immortal when it leaves the field, except by its own effect, you can destroy every monster your opponent controls, then inflict 800 damage for each one
And against in 151 when ZONE sacrifices himself to do what Yusei was planning to stop the Arc Cradle
While you do need to discard one Energy each time you use Thunder Blast, it is easy to work around this