Lifegiver from 12 gives you 40 hp total
Lifegiver from 15 gives you 28 hp total
2 EN gives you 24 hp
Lifegiver from 15 lvl is equal to 2 points of SPECIAL
Action boy gives you 1 AP
2 Agility gives you 1 AP
Action Boy = 2 SPECIAL
Weapon Handling gives you 3 SPECIAL, but in fact reduce your carry weight, with small frame it's a pain.
Sharpshooter gives 1 SPECIAL for BG and tanks and 0.5 SPECIAL for snipers, +2 sight range isn't a deal
Gains are totaly useless, it for example, Gain Agility gives you +0.5 AP and +2/4% skill and +1% dodge, compared to action boys, which gives you +1 ap, GA it's a crap.
To make fair Lifegiver, it should have 15 lvl req or gives hp based on your EN, so for 4 EN sniper, it wouldn't gives much like for 10 EN tank
(maybe formula EN/2)