Suggestions on string gauge for low tuning

[br_bass]

I am getting my bass setup and adjusted for C F Bb Eb tuning for the heavy/death metal band I play bass for. Ive been playing with this tuning for awile without having my bass setup and medium gauge strings, but im getting sick of the lose clanky strings I have as of now. But I wondering what would be a good string gauge for this tuning and to go along with the setup?

 

[Parabolic Box]

Just go up one gauge... .055-.110

 

[fenderthrupeave]

for that low I would got to a .115 for the C, but thats my opinion, I like to play hard and I get alot of string movment and I hate the clanking sound.