I already have two crankbait rods but none can handle the deep diving crankbaits.

I do have a doybns ss 705c. Would that be adequate?

Try A 706 or A 806 for deeper cranks.

Dobyn's 705C isn't designed to cast crankbaits, it's a fast action rod suited better for jigs etc. can you use, sure...it doesn't cast lures like a crsnkbait to well.

The 805CB RM is a crankbait rod.

Less expensive is KVD Tour 7'10" MH rated for 1/2-1 oz lures.

Tom