It has been my experience that the number of charges is the only sure thing about getting higher Master Crafter Talismans. The skill percentages are quite random. My best Alchemy Master Crafter Tally only has 10 charges, while my higher charged tallies have terrible percentages on them, and my Smithy Master Crafter Tally has 50 charges and has 30% exceptional & 14% normal.
Worth noting is that the crafting failure protection works no matter what skill or talisman you are using. I discovered that by having a Smithy tally on while glassblowing and it saved the materials anyway.