Actually, everything looks to be in order. You have 2 bars of signal strength, which means the phone has to work harder to communicate with the cell tower to compensate for the weak signal. That's why Cell Standby is at the top of that list.
And I'm not sure why people are telling you to disable LTE. You're clearly not connected to LTE. The 4G means you're connected to HSPA+ for mobile data, which is more battery friendly than LTE. When you are connected to an LTE tower, that icon will actually have "LTE" in it to let you know. So don't worry about disabling LTE...that's not the problem here.
And Lookout is not a problem, either. The atypically high rate in your screen shot is likely due to it just having performed its weekly scan of all apps and files on your phone. Keep in mind that the 11% it shows is 11% of the total 30% that has been drained. So Lookout is responsible for only 3.5% or so of your total drain. Perfectly normal if it's been running a scan. Note: if you see Lookout near the top of this list every day, then check its settings and make sure it's only set to scan on a weekly basis. If it is already set to weekly, then reboot the phone and it should go back to normal.)
If you have wifi available at this location, connect to it (it may require you logging in with a browser, so just turning wifi on may not connect you to it). I connect to wifi at work, and after 9 hours, my battery is usually sitting between 78% and 80%. If I don't turn on wifi, my one bar of cell service leaves me with a battery at 30% to 40% at the end of the day. Huge difference.
If you don't have wifi at this location, I'd simply suggest getting a car charger and an extra wall charger and keep them handy for when the battery gets too low for comfort.
Otherwise, this really doesn't look that bad at all. You're burning about 4.5% an hour. Not horrible considering the 21% screen use and the weak cell signal.