Vials of healing are items accepted by everyone, which is why the chance on them doesn't really change. If you suggest other items that are around what they would want, you should see the % go up though.
Carpenter isn't the best with a tailor, while tailor/carpenter isn't a bad combo, the best early game combo (that includes carpenter) is carpenter blacksmith, at least in my opinion.
Do try to time it so you can make as many combo objects as possible, and always always have your workers doing something, otherwise they're wasting time- and money.
or if your ice, know how to freeze attacks.
or if your poison, you can poison lock people with paralyze and poison wave (takes a long time though)
or if your burning hill you can launch a massive combined attack.
or if your greatsea, you can absorb their attack and send it right back at them.
... Not sure what to do with dark wood yet though.
atlantian magus is by far one of the best combo's i've yet to use.
And woohoo, i unlocked the title "epic" are there any better titles?(in terms of all stats)
 "RPG Shooter: Starwish"){kind=icon}
 "Swords & Potions"){kind=icon}
 "Castle Crashing \"The Beard\""){kind=icon}
 "Magi: The Fallen World"){kind=icon}
 "Endless Zombie Rampage 2"){kind=icon}
 "Book of Mages: The Dark Times"){kind=icon}
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 "Elona Shooter"){kind=icon}
 "King's Guard"){kind=icon}