What I'm saying is that Hellen's healing would allow home to shrug off more sever damage and keep in the fight. Alex Mercer could regenerate bullet wounds in seconds, and could shrug off an entire military base explosion. Heller's "head" is just there for show, and he could easily keep fighting even if it were blown off. Delsin can't fight through those kinds of injuries, and would need to get to a power source in order to heal, which would take time and leave him vulnerable.
And his Concrete powers aren't really gonna do anything to Heller. His lack of a bone structure makes him nigh-immune to blunt force trauma, and since Heller is most likely bulletproof by the end of the game (consumed Alex Mercer) Concrete is literally the most useless tool in Delsin's arsenal. Heller can punch right through it easily. It's only good for healing, and once Heller figures out that Delsin can heal via Conrete, Heller can utilize anti-gravity to make Del float, and then finish him off.
I'm iffy because some guy I've been talking to has been suggesting that's neon in an ionized form. And even if it were light, it's not like anyone in game has dodged a beam, so it would still only apply to his attack speed and travel speed.
Yes, I know about Delsin's plethora of abilities, but when considering Heller's AP, durability, regen advantage, most of Delsin's powers are now moot. Smoke? Heller can shrug off RPG and military base explosions. Concrete? Heller's survived worse. His only powers that are gonna help him here are his Video and Neon, due their Invisibility, Summoning, gravity manipulation and Travel speed, but even then, its not enough put Heller down. If even one piece of Heller is left, it's just gonna latch onto Delsin and consume him, creating the worlds first Conduit-Prototype.
Also, now that I think about it, Heller has the range advantage. His tendrals can cover all the streets in a city, meaning Heller can spike Delsin from the other side of a city.
Heller can also one-shot with a Bio-Bomb.