1. No need to improve on your current stats.
2. Save your money
As some of the pills you intend to take will have a slight effect on your current abilities, none will be notably different except for the Yohimbe. It will give you a temporarily more hard erection. None of the "benefits" are permanent.
The Zinc is close to OD. The max. intake for a male is 11mg. daily. Zinc is in the air, water, etc. Large amounts can cause, anemia, stomach cramps, and decrease the amount of your good cholesterol. Intakes of 150 to 450 mg of zinc per day have been associated with low copper status, altered iron function, reduced immune function.
The L-Arganine is vital but the body produces enough on its own. The average daily intake is 3.5 to 5 grams. Adding more is only necessary if your body cannot produce sufficient amounts. When administered in high doses, it stimulates pituitary release of growth hormone and prolactin and pancreatic release of glucagon and insulin.
The C is good. I don't think I've ever heard of too much C.
The B-12, however, I disagree with Aloofman. Vitamin B12's primary functions are in the formation of red blood cells and the maintenence of a healthy nervous system. B12 is necessary for the rapid synthesis of DNA during cell division. B12 is also important in maintaining the nervous system. Nerves are surrounded by an insulating fatty sheath comprised of a complex protein called myelin. B12 plays a vital role in the metabolism of fatty acids essential for the maintainence of myelin. Prolonged B12 deficiency can lead to nerve degeneration and irreversible neurological damage. The old Recommended Daily Amounts (RDA's) have now been replaced by the term Reference Nutrient intake (RNI). The RNI is the amount of nutrient which is enough for at least 97% of the population. In your case, 1.5 µg is sufficient. however B12 has very low toxicity and high intakes are not thought to be dangerous. The body absorbs B12 through the intestine, not through the normal digestive process so with most anaemic deficiencies, it isn't a dietary lack but an inability to absorb through the intestine. Thus, injections are necessary.
I'm not a doctor, I've just been into this stuff for a long time. Another thing about pills would be the fact that regardless of their potency, your body will only absorb 10-20% versus a liquid nutrition supplement which is 98% absorbed. That's why I take an awesome liquid nutrition supplement rich in what you are looking for through just a few pills. I found this through my research. It's good for A LOT of health issues or just to supplement your diet. It's called
NutraBurst
Try a couple of bottles.