Illithidbix
Explorer
Although I haven't had a chance to play it, I very much like 13th Age's combat whereaboust system for gridless play.
(http://www.13thagesrd.com/combat-rules )
As a very rough hack:
Engaged/Next/Behind = within 5'
Near = 30'
Far = 60' or 90' (not sure which works best)
It seems to be easy enough.
If an ally is Behind you, you can use your Reaction to Intercept an enemy who moves to Engage them.
If an enemy you can see is Engaged by you, then you may use your Reaction to make an Opportunity Attack if they attempt to move away (become free) unless they use their action to disengage.
If you are Engaged then Ranged attacks have disadvantage (as if you were within 5')
Either you cannot Intercept an enemy if you are already engaged, or doing so provokes an Opportunity Attack, depends how you want to play it.)
Reach is a bit harder to work with, but I'd go with "If you are behind an ally then you may use your reach to attack an enemy they are engaged with without having to engage with the enemy.
You do lose a bit of the move-action-move mechanism that 5E added (and I really rather like) and different movement rates.
(http://www.13thagesrd.com/combat-rules )
13th Age SRD said:Whereabouts
Each creature has a general, relative position on the battlefield. Combat is dynamic and fluid, so miniatures can't really represent where a character 'really is.'
Nearby
Generally, all the heroes and their enemies in a battle are nearby. That means they can reach each other with a single move action.
Behind
If you're behind an unengaged ally, and an enemy moves past that ally to get to you, your ally has the option to move and intercept.
Intercepting
You intercept a creature when you move to stop an enemy attempting to rush past you to attack someone else. You must be near the enemy and the person that enemy is trying to reach.
Far Away
Generally, the heroes and their enemies are nearby each other and you can use a single move action to reach any of them (provided no enemy intercepts you). If you want to be far away, two moves away from the enemies, make that clear to the GM and make sure there's room for that maneuver. Wizards and other casters sometimes like to be far away.
Engaged/Next
In a battle, each combatant is either engaged (locked in combat with one or more enemies) or unengaged (free). When two allies are engaged with the same enemy, they are considered next to each other.
As a very rough hack:
Engaged/Next/Behind = within 5'
Near = 30'
Far = 60' or 90' (not sure which works best)
It seems to be easy enough.
If an ally is Behind you, you can use your Reaction to Intercept an enemy who moves to Engage them.
If an enemy you can see is Engaged by you, then you may use your Reaction to make an Opportunity Attack if they attempt to move away (become free) unless they use their action to disengage.
If you are Engaged then Ranged attacks have disadvantage (as if you were within 5')
Either you cannot Intercept an enemy if you are already engaged, or doing so provokes an Opportunity Attack, depends how you want to play it.)
Reach is a bit harder to work with, but I'd go with "If you are behind an ally then you may use your reach to attack an enemy they are engaged with without having to engage with the enemy.
You do lose a bit of the move-action-move mechanism that 5E added (and I really rather like) and different movement rates.