In response to the concerns about grip, I'll chime in and say that the only way to improve your grip is to work it. Instead of being concerned about taxing your grip, I'd encourage you to tax the heck out of your grip until your hands are strong enough that it's no longer an issue. Then again, I'm an armwrestler, so I'm cuckoo for grip work.
I'd also consider ditching the curls, tricep extensions and lateral raises. Having no idea what your goals are or where you are in your training, this is a shot in the dark - maybe those exercises make sense for you in your routine. But in general, I'm learning that upper body compound exercises like rows, chins and presses not only do enough for the arms, they are actually better at building size and strength in the arms than single-joint curls etc.
Best,
Adam
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