[Balance] Fix useless class powers
Right now, Druid and Merchant class powers are almost useless.
Druid: almost all class powers (except =Elec and -10% corruption) are crappy and/or useless. Weather effect immunity? Good on 6xl, but not on 18, for God's sake. Summon animals? Meh. 2x PP or HP regeneration on wilderness? Regeneration on wilderness is quick enough for all classes, besides, there are no big fights in wilderness.
Merchant: again, his class abilities are crap. Mediocre 2x/3x carrying capacity - OK, I can live with that. But rest? Immune to weather on 25xl? Lesser shop prices? Is this a joke?