Toothed vs. scrub

[Osvaldo Cristo]

Guys,

at last my wife is back from her vacations and brought me my extra Lee Nielsen irons for my Jack plane.

I already had the regular iron (25 degrees) and the scrapping iron (90 degrees) and now I received a toothed and a couple of extra regular blades. My idea is to take both extra regular blades and microbevel them at 30-35 degrees and one of them to round the edge in order to transform my Jack plane in a scrub plane.

Today I tested the toothed blade: it works very well but I had the sensation of imminence to get one of the teeth broken constantly. They look so fragile...

I have the intention to work manually my unsquared lumber one of the faces with Jack plane to prepare the piece to run thru my lunchbox planner. I need a robust and reliable tool for that as usually our local woods are hard and, of course, I do not have intention to spend a lifetime preparing the piece to run thru my power plane.

Question: from your experience, what is more productive in that scenario, a Jack plane with a toothed blade or a scrub iron at 35 degrees in my Jack plane (12 degrees frog)?

Thanks in advance for your usual sound advice!