(Ranged) Blight monsters occupy the same physical space (ie: 'stack up').

Preamble:
This report is a continuation of (Ranged) Blight monsters attack foes which are not directly in their path. It seems like that topic was silently marked 'solved' after a GGG post addressed the literal report but not the underlying bug. With the Blight mechanic going core, I feel it is important to ensure GGG is aware of the bug.



The report:
Blight mobs have a tendency to stack on top of each other, occupying the same (or very nearly the same) physical space. When this occurs with ranged Blight mobs their projectiles also tend to stack on top of each other, resulting in a visibly single (though perhaps brighter) projectile that hides multiple projectiles.

https://www.youtube.com/watch?v=hvGay6lp5ys&t=693
https://youtu.be/tb7bNZZut2s?t=607
https://www.youtube.com/watch?v=hQzTMGyN6TE&t=640



Normal 'ranged mob' interaction:
Ranged mobs will normally 'fan out' to attack a player. The first mob in a group will walk straight towards the player until in-range, then attack. The second mob will walk towards the player but to one side of the first mob. This continues until the mobs are spread out in a circle, each at attack-range of the player. If a mob can't reach attack-range of a player (ie: is blocked) it'll just stand there stumped.




The exception to 'normal':
The stacking behavior *can* be observed with non-blight mobs in special circumstances where the ranged mobs are 'funneled' together by obstacles, then 'turned' by continuously tanking their hits while moving around them circularly or through them with phasing/dash/etc, causing them to take very small steps to stay in-range. Eventually a few of them *might* step into the same space. I spent about 30 minutes to achieve this in Ledge with skeleton archers. The stacking behavior occurs with Blight ranged mobs very frequently and without player effort.



An example, illustrated:

• Time T0: The first ranged monster (M1) exits the portal. It starts walking down the lane at a movement speed of Mm.
• A unit of time (T) passes.
• Time T1: The second ranged monster (M2) exits the portal. It starts walking down the lane at a movement speed of Mm.
• The distance between M1 and M2 is equal to Mm * T.
• A unit of time (T) passes.
• etc.
• Time Tn: The nth ranged monster (Mn) exits the portal. It starts walking down the lane at a movement speed of Mm.
• The distance between Mn and Mn-1 is equal to Mm * T. Thus, if we were to observe the lane we should see a string of monsters, equally spaced, walking down the lane towards the pump.
• -
• Time Tz: M1 moves within attack range of the enemy object, Player. M1 stops moving and attacks Player. Player is now under attack from 1 monster. Number of projectiles per visible projectile: 1.
• A unit of time (T) passes. Other monsters continue their movement.
• Time Tz+1: M2 moves into the same space as M1 and within attack range of the enemy object, Player. M2 stops moving and attacks Player. Player is now under attack from 2 monsters. Number of projectiles per visible projectile: 2.
• etc.
• Time Tz+n: Mn moves into the same space as Mn-1 and within attack range of the enemy object, Player. Mn stops moving and attacks Player. Player is now under attack from n monsters. Number of projectiles per visible projectile: n.