When is more better?

[Coffee Vampire]

Here's a straight-up question for you:

In what situations should one run a playset of a given plainswalker, and why?

I have been trying to figure this out. 3 usually seems like the magic number to me but still not sure. Any imput from people with more experience?

[#noided]

When the PW is called {Jace, the Mind Sculptor}. I think it's pretty self-explanitory.

[AgrusKos]

Depends on the PW

[Maximo]

4 of is only when it's cheap and their abilities are really useful short term, like the middle abilities of {Ajani, Caller of the Pride} and {Lilliana of the Veil}.

[Willthomjr]

4 of is only when it's cheap and their abilities are really useful short term, like the middle abilities of {Ajani, Caller of the Pride} and {Lilliana of the Veil}.

I was about to make a similar comment about -minus- abilities that are really good and of course cheap to cast.

[smokin terry]

When the PW is called {Jace, the Mind Sculptor}. I think it's pretty self-explanitory.

And beleran. To kill of your opponents mindsculpors.

[Kaleo42]

Questions to ask yourself when deciding how many to run.
How easily can i cast this ({nicol bolas, planeswalker} vs. {garruk relentless})?
Am i going to keep it on board and have dead ones in my hand, or do i want to cycle these out one after another ({gideon jura} vs. {liliana of the veil})?
Are these effects that i will always want or are they fairly situational ({karn liberated} vs. {tezzeret, agent of bolas})?

[Juggalonoke]

Questions to ask yourself when deciding how many to run.
How easily can i cast this ({nicol bolas, planeswalker} vs. {garruk relentless})?
Am i going to keep it on board and have dead ones in my hand, or do i want to cycle these out one after another ({gideon jura} vs. {liliana of the veil})?
Are these effects that i will always want or are they fairly situational ({karn liberated} vs. {tezzeret, agent of bolas})?

ComPletly agree each pw total is dependent upon the deck it is to be played in.