Build runs pretty smoothly so can be done with lower stats, but with recommended stats u can 100% go afk with tb active. Make sure to use the lamp by the forge to teleport to the other core, it will save you around a minute of build time. If you just want to farm mr.peckers, you only need to upgrade the buff beams. Add your splitsreen characters during wave 24.

HINT 1: place the 4DU buff beam on top of the pot and connect it to the ground. Towers will sit on the pot, whilst the golem will be on the ground. if you have lower stats, make sure the golem isn't too close to the crystal, imo it should be fine though as ogres get melted before they can reach the crystal anyway. 

HINT 2: place the golem on the buff beam close to the spawn, then place warden & app towers behind it, they should be just ahead of the tree by the ledge & not have their line of sight blocked by the tree. afk here with tower boost. 

TO REACH 5 MIN:

near the end of the wave, teleport to the other crystal to help clear out the super wyverns faster. There is an ogre that likes to get stuck on the ship up north, you will need to watch out for when he spawns, then hit him to draw aggro and lure him over to the crystal. Stay out of range so he doesn't stop to throw a snotball at you, otherwise this will add a few seconds extra to the run time