Powerwell vs. Willpower (what do I miss?)

By Gregorius21778, in Dark Heresy Rules Questions

Greetings, brethern,

I was looking over the "Power Well" Psyker Talent which is giving a psyker a meager +1 Bonus on Power roles for 200xp (reptitive buy optional).

I wonder why a psyker should spend points here instead of "maxing out willpower". Since Willpower is adding to the "power role" the same way, eve the final "raise" (expert, +5 for 750) is considerably more "cost effective" (+1 for 150xp) then this Talent...or is meant for the psyker "that raised it all"?

Gregorius21778 said:

Greetings, brethern,

I was looking over the "Power Well" Psyker Talent which is giving a psyker a meager +1 Bonus on Power roles for 200xp (reptitive buy optional).

I wonder why a psyker should spend points here instead of "maxing out willpower". Since Willpower is adding to the "power role" the same way, eve the final "raise" (expert, +5 for 750) is considerably more "cost effective" (+1 for 150xp) then this Talent...or is meant for the psyker "that raised it all"?

Please ignore my post...I forget the psyker get the WKB (!BONUS!), not the WK. Please do not reply, this question was stupid, thank you!