Okay, so I just started the game and I wanted to try to complete the monthly (yeah, I know, probably impossible within 5 days but I'll try it anyway). I have a level 31 Huntress with a fairly strong MIRV legendary bow, and for the current Incursion level I can hold a lane by myself on Wave 1 and hold the lane with flame towers from Waves 2-5 (stun + oil into flame towers + piercing shot if necessary, on top of all of the MIRV AoE). Since I saw that most games, the Wyverns kind of screwed us, I decided that I'd focus more on taking down Wyverns and AoEing enemies in between waves with the MIRV,