Question: I would use 14/2 Romex coming from 15amp circuit breaker then pigtailed to 2 differnt Light switches. [![enter image description here](https://i.stack.imgur.com/74zA0.jpg)](https://i.stack.imgur.com/74zA0.jpg)

Answer: 
Everything you are describing *could* be explained by a disconnected neutral that might be within your premises or outside. You should start by calling your power company and suggesting they come look for that specific problem. You could also call an electrician to look for it.

With this problem:

* Some devices will not work sometimes, or will work partially or poorly with fluctuating supply voltage when *other* devices are turned on. The connection between devices will appear random.
* Devices with metal housings (including the metal housings on HDMI cable ends and the ground shield on coax cables), where those housings should normally be at ground potential, may come up to various voltages. The effect gets worse if the building's grounding is poor or doesn't exist.
1. Disconnect all items that have coax and/or HDMI from AC power/Wall AC adapters and from the wall's coax plate(s).
2. Now, measure the voltage from pin to shell on the closest-to-cable-provider/utility-plate. If it is not 0VDC and 0VAC, call your cable provider.
3. One-by-one start re-connecting your items to the coax/hdmi. Measure the voltages. If OK, re-connect their power source. Re-measure the voltages. If good, repeat this step for all of your items, one-by-one. I'm guessing that the culprit(s) can be quickly determined in this fashion. Given your 'lightning' incident, it could very easily be that all of your devices will have to be replaced.