talking about the dips, i thought dips is one of the best for tricep, thats what i've read in an article somewhere in the web but if it's not good.. i'd better change it.
Dips are good. They are one of the best exercises for upper body strength and mass. But chair dips suck. If we are thinking the same thing (i.e. the dip version where you have a chair behind you and you over extend your shoulders and flex your elbows to get to parallel. Those suck. They are very harsh on the rotator cuff muscles on your shoulders and all the joints, tendons and ligaments around that area. Doing regular dips with arms on your sides or even in front are great for your goals.
One arm pushup? is it good exercise? i can make but only 3-4reps/arm
Personally, I see much more value in doing an exercise you can only do for 3-10 reps than an exercise you can do for 250 reps. It's a harder version of a push-up. It's the step you take to get to the next level. The mechanical tension on your triceps and chest increases like hell.