My only suggestion would be to not have Wyll talk for you Except for selling to merchants. Abuse his high Cha to get better deals.
You are the MC, have the convos yourself even if you have a few points less than Wyll. All approval and relationship building only applies to the person talking, so you won't want to waste that all by letting an NPC get the credit.
At level 1 rangers actually get more skills(4-5) than Bards(3), they just aren't the talky ones. Pick up a Cha based background for persuasion or dsception and you'll be fine for the important checks. Usually the hardest checks (20+) are more RP than mechanics. Plus there is almost always another way to accomplish your goals than just "talk gud".
The hardest Cha roll in the game that I've seen is a 15 then 20 to convince Minthara that you're the boss in the romance. So far that only modifies the intimacy cuscene that follows, but nothing game changing.
