[Al-Khwarizmi]

Coarser nibs are harder to clog. Changing ink to a more liquid one can also help, and sometimes a given ink just does not go well with a given nib. I don't use the same nibs as you do but you can search forums for ink recommendations for your specific nibs.

If you want another fountain pen, I recommend the Platinum Century #3776. It has a locking mechanism that prevents ink from drying so it prevents clogging when the pen is not used for a few weeks. For me it works like a charm.

PS: Keep in mind that Japanese nibs like the Platinum are finer than European nibs. So for example a Platinum M should feel roughly like a Lamy F.