Iosol is 1830 mcg per drop, or 1.8 mg. To get to 50 mg, you'd need 28 drops.
It's easier to get too much iodine than it is iodide. Trapper has recounted how he got up to 300 mg Lugol's, and was having difficulty with it until he applied magnets, which is believed to loosen the iodine I2 bond and make it easier to metabolize. I can handle 150 mg Iodoral -- in fact, I don't sleep well unless I use this amount -- but any additional amount has to come from potassium iodide (SSKI drops).
These are refinements you can worry about later. For now, see what Iosol can do for you. Then decide if it's enough, or if you want to explore further.
I think you may be a little hung up on trying to predict that Iosol may act as Lugol's if just the right number of drops is taken. It can't happen. IMO, even Lugol's and Iodoral don't act the same, and they have the same formula. 50 mg of Lugol's is 20 mg iodine and 30 mg iodide. To consider only the iodine portion of that to figure out your drops of Iosol ignores the 30 mg of iodide. And I tell you, iodide is a big player. That's why I recommended converting the entire 50-mg amount into 28 drops of Iosol. Now, can you tolerate 28 drops of Iosol? You'll tell us.
Another thing you could do would be to take your 11 drops of Iosol for the iodine, and make your own SSKI for the iodide. We've referred to making SSKI many times. Potassium iodide crystals seem to be widely available. Then you could have both your iodine and iodide. No magnets needed. Or maybe you'll just need a bit of iodine, maybe 2 drops of Iosol, and the rest SSKI. That'd be vaguely similar to the formula Trapper's made, which includes SSKI, a bit of iodine, and magnets to smooth the solution. You can even buy your own magnets -- we have pictures showing how to apply them.
In the meantime, take your Iosol and find out where it takes you. Revisit your decisions frequently.
Oh, Triquench will work just fine. Use it for your SSKI. Consider one drop of Triquench for every drop of Iosol. That way you'll get your bit of iodine and a larger bit of iodide. You'll get started learning your best ratio.
NOTE: I'm saying this based on the sense that you are male. If you are female with iodine-specific problems such as cystic breasts or ovaries, your need for iodine (Iosol) will be much greater.