TLDR; We is boned with the current parameters. Lets hope the new AX weapons significantly shift the balance.
"Bruce G Senior Community Manager Frontier
11 minutes ago
Dev Post
Hi [Redacted],
I understand these elements could be clearer and we're currently looking at improving how we present that information. The attack cycle refers to the number of days remaining in the week to win back the system. The time to invasion marks the total number of days until the system is lost.
Invasions last a number of weeks. Each week represents an opportunity to complete the progress bar which results in the system being successfully defended. If this is not achieved, progress is reset as a new attack cycle begins. This repeats either until the invasion time runs out and the system is lost or the progress bar is filled in a given week and the invasion is repelled."