i'm not getting this 1-2shot then trap then repeat rinse combo..
i always lay down 3 traps at once..
you are not mistaken, they are theoretically identical damage output over infinite time
the use of 1 at a time is more for management/efficiency distributing the damage as evenly as possible
when you are starved for hatred, waiting till you have 90 again can become a waste of time (since the monsters may all be dead by then) you'd be better off shooting 2-3 then putting down a trap and getting the full potential of your layered damage
there is nothing wrong with all 3, then shooting for 3.2 seconds, for longer fights
the models are there for you to notice that in 3.2 seconds you need to drop 3 echos and have x seconds left to regen 90 hatred; that is another way to look at it
with 4 hate/sec (x3.2 seconds) the echos cost 90 over = 77.2 remaining
you also need to shoot nearly 26 bola shots to regain that hatred.. impossible
with 7hate/sec you need to create 68, and 8 shots of tinkerer(+grenadier) will do it
if 8 grenades do it, and you have 3 echos, thats 11 shots in 3.2 seconds or 3.43 APS, a ton of aps is needed.. so you still have potential hatred issues that can be solved with M4D, vengeance, a templar, gear.. until you can sustain 29/hate sec you are not using spike trap to it's fullest
derivations of a shot pattern are simply going to have to adapt to the game as you encounter it