Transmission lines with cooler

[AirSpeed]

Getting ready to install a new radiator and got to looking at my tranny lines, they're a mess. The PO did a hack job on them, they've got to be replaced. Should I run hard lines to everything or is it cool to use hose from the end of the line to the cooler and back to the radiator? What is the correct flow, I mean which line goes to the cooler and which goes directly to the radiator? I dont trust anything the po did and dont want to go off his work. Should I make my own lines or just order a set? I have a tubing bender but no flare tool. If I can buy a flare tool and tubing for the same or cheaper price than buying premade lines I wouldn't mind doing it myself. Any tips or suggestions would be greatly appreciated!
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