Salvaged Assaultron Head irradiates the user upon use... the Ghoulish perk restores HP whenever you take rads... I mean if that works, it's super situational and gimmicky, but it's still neat.

dat 5 hp >_>

Don't you still accumulate red on your health bar with ghoulish? Seems like this would indeed be a super situational combo, as in why not just use a better weapon if you're low on health and get it done quicker then restore health by normal means?

Just give the gun to Hancock

Ghoulish only heals while you're being irradiated and rads will still overtake the green portion of your HP. If you stand in puddles out in the glowing sea that gives like 50+ rads per second the empty part will regen super fast but once the green and the red meet the red portion will grow as normal.

Using the Assaultron Head will just give you a quick ping of regen, you'll hardly be immortal.

Unless you are solar powered and you lose rads as you heal.

The Solar Powered radiation healing can't counteract 50+ rads per second

I'm ignoring the standing in the glow part because it's irrelevant. We are talking about the gun.

Which was also covered, Ghoulish only heals you while you're irradiated, a non-continuous hit of rads will only heal you for a little ping, like 5-10 HP, while the rads hit effectively damages you for 50 HP, even if you regen the rads afterwards you still used up 5 fusion cells to get 5-10HP, that's hella wasteful. Especially if you have Solar Powered since that will heal you anyway.