Sure you can dual a human fighter to a druid.
What you need:
15 str.
17 wis.
17 cha.
SPOILERS
PS: the str and wis you probably already have planned to max out, but with regards to the charisma, you just have to suck it up, as the ring of human influence won't work.
-Sylvanerian
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Qualis Artefix Pereo
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