This post is intended for serious top level play.
Mutant's invaluable L4 is the only thing allowing him to be competitively viable, without it he would be strictly a pub stomp hero. His builds not only depend on the hero matchup but the flow of the game. In a normal high level game it is almost always necessary to upgrade hp early on for your heroes unless it is a specific scenario where survivability isn't needed. Lurkers are needed in every matchup. this excludes against warrior and assault, but those heroes require Mutant to have his L4 to survive anyway. L4 against LM is just a big no. Also note that an extremely pro Volt will know that his only defence against lurkers is a straight switch to L4 since late game Mutant can lurk from a distance, wait for Volt to L2 then go in for the rape with his L4.
Quote from name:Jennifer Love Hewitt
volt - lv2 (and dont even say manual, the volt is going to be running while using it, and attack+move freeze glitch happens to ultra more than any other sc unit, even zealot)
Wrong. This MAY happen on a rare occasion but the Volt's L2 turns him into a crawl and the only way he can survive the ultra is if he has PLENTY of hp to withstand the damage which the Mutant will just lurk away beforehand before finishing him off. Note that besides in base scenarioes, Mutant will tend to control the direction of the battle since Volt is a DEFENSIVE hero.
Going against Medic teams are a different basket altogether usually requiring an L2 + mass Hp build.
It's hard to explain but generally speaking the Mutant should focus on lurkers once the mineral intake has been significant enough for some serious DPS. This can be longer then people think because of a few reasons.
1. Most heroes are going to have upgraded their Hp.
2. Mutant has a bad opening game, only capable of stalling. He would require heroes such as Spec Ops, Archer, Assault, Summoner, Dark Mage or Medic to expect any captures.
3. Not only does the mineral intake of your team matter, but also the other teams' relative minerals are counted since armor can make lurkers ineffective at low and medium levels.
Also note that it is extremely unwise to ever put anything else besides 2 levels into minerals because ling's main weakness is that he is dependant in ALL areas and has no levels to spare. Having less then 5 melee is also unwise since he needs to be as effective at stalling as possible.
With that being said, the latest to ever focus on lurkers is when the marine spawn starts. This is the time in the game where ling's power skyrockets over all other heroes. The mineral intake for ling starts becoming uncounterable by armor as well as heroes without decent amounts of hp. This is because ling is the only hero able to effectively splash allied marines, and by that time of the game he most likely has enough mana to do so every wave.
Exactly why does nobody ever post any l4 builds for mutant? Why haven't I seen many builds on the mutant's l4? It's absolutely godlike VS Light Mage, with over 300 damage per hit w/ 20 melee upgrades.
Just a medium level pubstomp tactic. Shouldn't ever work. Lurkers are the only reasonable way to destroy the LM.
None.