I just got my new ESP NT7B guitar, but struggling to find a good way to play C-tuning metal songs (Arch Enemy, Dethklok etc.). I would like to still keep the 7th string as B or drop to A (playable for some common 7 string songs), but want a playable C-tuning on the rest of the strings. Here are some proposals: 1. B C F Bb Eb G C (C tune 1-6 string) 2. A C F Bb Eb G C (7th Drop A, and C tune 1-6 strings) 3. G C F Bb Eb G C (All down tune 2 steps) 4. B C A D G B E (Drop 6th string to C) 5. A C A D G B E (Drop 7 and 6 string to A C) 6. some other options? What do you prefer for a good compromise, play-ability and string-gauge-find-ability?