Raistlin -- This talent is awesome, especially since it's a Dragonlance reference. I think it's calculating HP wrong though, at least in combination with lone wolf (also awesome). At level 8 my rogue without it, with 5 con and lone wolf, 411 HP. My wizard, with 6 con and lone wolf, 323 HP, not exactly half...
I think the descriptions need to be adjusted, to specify the bonuses/penalties apply to the base value. The talent effects are applied separately: