Hi guys, I have been using D'Addario 9 gauge strings for like last 6 months (changed them 4 times) on my Ibanez GRG170DX. But recently I started playing death metal and the problem with the 9 gauge strings is, when I drop the tuning, they feel too loose and the lower E string causes too much buzzing. Also, i need some heavier sounding strings. So will getting a 10 gauge string set work? Also, is there any string set in which the lower strings are heavy and upper strings are light? Like mixed gauges. I was planning to use the lower 3 strings from the 10 gauge set and upper strings from the 9 gauge set. But these people say they don't sell individual strings. What can I do?