Two fall-arrest lanyards?
Yes. The norm seems to be to use a twin-leg fall-arrest lanyard with a single snap-hook to the harness; normally the dorsal ring. We don't have any sort of cable climb system, nor have used rope grabs or any of the newer SRLs. I've always just had two, (non-absorbing) single-leg lanyards plus a pair of rebar hooks on my seat-sling. I'd love to learn more, up-to-date technique(s), but what I was taught was to alternate tie-ins so that your always clipped in while ascending/descending, then once you're stopped, you maintain two points - positioning and fall arrest.
I opted for two, single-leg lanyards because there are times when I find the front D-ring is preferred, and if you unclip from the harness you've lost two (potential tie-points). It can also be difficult to clip in and out of the dorsal D-ring on the tower.
I looked at some of the Petzl harnesses..and several others. They used non-metal rings to reduce weight and reportedly are among the most comfortable. The one thing I didn't like (aside from the rings) is that on the closest comparable they have tear-away stitching in the harness. So, if you fall and it gets deployed your ($$) belt has just become a wall ornament. I have two aluminum rebar hooks made buy Petzl; love those. They are the only manufactuturer where you can open a link to connect or remove them.