I run Vertex magneto condensers . . . expensive, but they have never let me down. Also, I have a condenser "tester" - that charges them, checks the fly-back, etc.. You really can't test a condenser with just a multimeter.
Here is what I run on all my Harman Collins dual coils - have never had one fail:
https://fuelinjectionent.myshopify.c...36uf-condenser