L1/L2 visa and L2 EAD renewal

[nirav_n10]

Hello,

Here is expiry date details of L1/L2visa and l2 ead.

my visa L1B, my wife's visa L2, my i-94, my wife's EAD : SAME expiry date march 2017.
My wife's i-94: 2019

I am going India to renew my visa L1B next year.
1> What's the total duration to get new L2 and EAD for my wife from USA after my visa get approved and when can I start that process?.
2> Can she travel with me for visa stamping, so we can reduce the process time for only EAD?
3> What's the beat scenario, so she could get L2 visa and EAD in short time? Can we apply both together?

Thanks,
Manish