400 is the baseline from activities before you start purchasing things in shipments using GET or Championship Tokens or whatever other currency you like for your Kyros.
It also doesn't include active farming of Shock Prods on their LS node or Comps on their DS node. You should bet 2.2-2.5 per 50 crystal refresh if you're farming those.
For people who are younger accounts, they still need to spend all their refresh energy on shard farming, but there will come a time when you have free enough characters to farm that you can fit in 360 energy or more for those Kyro farms, which means about 7/day or over 200 per month.
At that point you're at 600/month with activities plus regular energy farming, and you still have the opportunity to purchase more with GET, Championship currency and other currencies (though I don't recommend it, value-wise) or even crystals.
For younger accounts the priority on shards will limit your ability to catch up with Kyros, and you'll probably even slip farther behind for a while since you might be using more of your GET2 and Championship Tokens for other gear. But there will definitely come a time for every long-term player where Kyro income + Kyro farming + Kyro purchases outstrip the requirements of new toons being introduced to the game. You still have to keep moving forward, but from that point it's always downhill.