Well, the typical rule of thumb is "No plyos until you get to 1.5 x BW Squat and 2.0 x BW Deadlift." I think you can always do some plyos, but at your current strength level, it won't make much of a difference. It's sort of like a car, you can fine tune it and give it new tires and make sure it's aerodynamic and that will make it faster. But sooner or later, you need a bigger engine to go any faster. Stronger Muscles=Bigger Enginer. That helps me understand it.
Well, as far as your nutrition goes, you don't need supplements. They make it easier but you don't have to have them. Putting on weight is easy, EAT MORE! It's that simple. Now, what do I eat more of? That's the tricky part. I like the paleo style, which means you eat only stuff that grows or runs. Basically a natural food diet. In our society, it's next to impossible but if that is the backbone of your diet, you will be better off. I'd say stick to adding 500 calories per day to your average intake. And from looking at your little food journal above, it should be mostly protein. Stick to animal sources if possible, a lot of meat! That should get you a good 2 pound gain per week. Once you reach your target lean muscle weight, you can drop back to your normal caloric intake and that should help you cut excess fat.
It's harder than it sounds to eat a lot more than normal. Especially healthy foods. You have to eat a ton of veggies to equal a few french fries.
Just my 2 cents.
