Lua defense map level 3 is too big

[Lazarow]

Was going arbitrations and up to wave 10 it was fine and went like 10 minutes to do, then when we got to the third zone which may also be the last it took forever for the enemies to come to us so we had to seek them out and at the 30 minute mark and we at wave 17 I just hoped the objective died, instead I died and left(Dont know if I got the vitus cause nothing was shown in rewards or mod pickups on end screen). The map need to be smaller or the spawn zones need to be closer or something that will not make the defense take hours. Its just not enjoyable and at this point the lack enemy spawns/slow spawning of enemies is what made the mission difficult not the enemy strength