When you say 'struggle', what exactly do you mean?

You're a tier 1 golfer with an excellent 3 wood so I don't think that a simple change of equipment would be the best option. If you were okay from the tee and iffy from the fairway you might try a shorter shaft but if you can strike the ball well from the fairway, there should be no difference from doing it off the tee box unless you are teeing the ball too high. If it's purely distance, DGS300 is a good shaft for an iron but I'm not sure that I would want it in my 3 wood. I would be more inclined to use a graphite shaft: Aldila NV, Aldila NVS or UST Proforce2. For TM heads, UST shafts appear to match very well.

__________________
Cleveland Launcher 460 - Aldila NV 65 x-stiff
Callaway Big Bertha 3W - Aldila NV 75 x-stiff
TaylorMade Rescue Dual TP (16°, 19°) stiff
Mizuno MP-32 2-PW Rifle Flighted 6.0
Titleist Vokey Wedges 52°, 56°, 60°
Scotty Cameron Circa 62 #3 35/330