I have already fired off an email to him. There's no harm in getting a second opinion. Besides, it encourages discussion by posting it on here and other people might benefit from the replies.
Is it electric?
I think you are on the right track. The proper string tension that allows the guitar to ring correctly and also allows the slide to ride on smoothly is a relationship between string gauge and tuning. If your instrument has a standard scale length, the strings and tuning you have selected should work well together. I use these strings and tuning on my resonator CBG.
Please feel free to write if I can be of further assistance. Enjoy, Keni Lee