
Waveform
Morphling dissolves into liquid and surges forward, damaging enemy units in his path. Morphling is invulnerable during Waveform.
Abilities, roles and builds with an explanation for every purchase.

HERO GAME PLANI farm with adaptive attributes, choose when to go in, and use Morph as the situation demands.
Shifting his attributes to suit his situation, Morphling can be as elusive as he is deadly. Whether riding a wave to flank an enemy, or boosting his health before escaping into his deceptive replication, few can hope to corner him.
My recommendation is a starting point. We choose another position together with the team and for its needs.
I need protected farm, my item window and damage on important targets.
Levels, lane control and joining the team at the right moment matter.
This is an editorial starting plan based on hero mechanics. It is not presented as a match I have already tested or a popularity ranking.
Here is my initial plan: I do my role's job first, then choose the items the team needs. I adapt the order and expensive purchases to the opponent.

Provide attack speed and switchable attributes for farming and managing my resources.

Increases a ranged hero’s attack range and provides useful attributes.

Provides illusions for pressure and a separate dispel. This item cannot help you wait out or remove every disable.

Improves attributes and lets attacks keep a target under control, limiting suitable sources of its restoration.

Helps recover health through attacks during its active window; without access to a target, it is not a guaranteed save.

I do not assign one ‘correct’ minute to every purchase. I look at my gold, the next fight and the problem: am I missing mana, target access, control or protection? If an expensive slot will arrive too late, I get a useful answer earlier.
Original Valve icons and descriptions. Cooldowns and mana are shown by level from the data snapshot; talents and upgrades can change the values.

Morphling dissolves into liquid and surges forward, damaging enemy units in his path. Morphling is invulnerable during Waveform.

The hero launches a stream of water at an enemy unit, stunning and knocking it back and dealing base damage plus damage based on the owner’s agility. The agility multiplier is at its maximum if the hero’s agility is 50% higher than his strength.
Launches a surge of water toward an enemy unit, stunning them, knocking them back, and dealing base damage plus additional damage based on Morphling's agility times a multiplier. If Morphling's agility is 50% higher than strength, the maximum agility multiplier is used. Knockback distance and stun duration are based on Morphling's strength. If his strength is 50% higher than his agility, the maximum knockback distance and stun duration is used.

The hero changes his form, converting strength into agility at a rate of 4/8/12/16 per second. This process is reversible.
The hero changes his form, converting strength into agility at a rate of 4/8/12/16 per second. This process is reversible.
Morphling can shift attributes while stunned. Reduces mana cost.

The hero changes his form, converting agility into strength at a rate of 4/8/12/16 per second. This process is reversible.
The hero changes his form, converting agility into strength at a rate of 4/8/12/16 per second. This process is reversible.
Morphling can shift attributes while stunned. Reduces mana cost.

Morphling changes his form to match the targeted enemy, gaining their basic abilities and changing his primary attribute based on his target. Can be toggled for the duration of the ability.
Morphling changes his form to match the targeted enemy, gaining their basic abilities and changing his primary attribute based on his target. Can be toggled for the duration of the ability.
Adds an alternate cast mode to the ability. When enabled, it creates a strong illusion of the selected hero that can use all their basic abilities. If the illusion is alive when Morph is used, the hero moves to its location and destroys it.
These abilities are not necessarily available at the same time. I check the condition beside the name: innate ability, another form or an Aghanim purchase.

The hero gains cast range and slow resistance bonuses based on current strength, and attack range and movement speed bonuses based on current agility.
Morphling receives bonus cast range and slow resistance based on his current Strength, and attack range and movement speed based on his current Agility. These bonuses persist if he is morphed into another hero.
These are fields from the official source. The hero's final values in the client account for attributes and other active mechanics.
Items, slang and real episodes help connect abilities with what happens in a match.