Ple-Sen
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In general, charisma is less useful here for two reasons:
1) Previously, social skills were located in the perks and origin sections and did not have levels. Now, you can spend half of your experience points on them.
2) Previously, skills and characteristics were linked to each other. By taking magic, you gained energy and willpower. By taking melee weapons, you gained accuracy and dodge/health. But now, this is not the case.