to begin with here are some pictures on formations:
Tank or Cyborg only formations:
Universal Approach

Large attack and defense increase
Small speed and speed decrease
Better Defense

Large defense and range increase
Small attack and speed decrease
Better Attack

Large attack and speed increase
Small defense and range decrease
VTOL only Formations :
Scattered Approach

Large speed and range increase
Small defense and attack decrease
Effective First Strike (inverted ladder)

Large defense and range increase
Small attack and speed decrease
Surprise Attack

Large attack and speed increase
Small defense and range decrease
to be used on both :
Concentrated Firepower

large attack and range increase
small defense and speed decrease
Focused Defense

large defense and speed increase
small attack and range decrease
I tried to make they balanced
i think this would greatly increase tactical management
for formation limit of how about 5 in each pattern and repeats it next to each other
for diamond it would go to the borders focusing on covering front
for concentrated firepower it would be something like "retangled"for example if i have 50 units attacking a base they would be in 5 big retangles distribuited in 5 5x2 rectangles
since vtol is supposed to be fast i created the speed and range formation for they
you could select formation by group selecting and pressing alt+ a number from 1 to 5 representing the possible formation on tanks or cyborg,vtol
