Option One.
Most players have voted for a limit.
It appears that many still do not understand the Force Limit concept as many vote for a Force Limit so high that it would be ineffective.
Look at the Beacon/territorial map.
If the game is to include the feature Dark Essence and troop darkening in a meaningful way, the existing rules are not producing those results.
1) increase the frequency and strength of dark horde attacks to increase dark essence gathered at beacons
2) establish Option 1 as the Attack Force Limit.
3) establish reduced Attack Force Limits at lower level beacons
4) review the availability of offensive forces that use little or no food as these may defeat the Force Limit concept
5) consider replacing the Force Limit standard with an Offensive Strength limit due to problems created by the introduction of low food consumption units.