A Question about Hulk-Flash

[B3457]

I know that Hulk-Flash started out by killing with a menagerie of Disciple of the Vaults and 0-mana artifacts which died as they came into play, then moved to a Kiki-Jiki hasty token-creating jumble, and now has moved to the kill of Heart Sliver + 4 Virulent Slivers. 

Is there any reason that this happened?  Is it because 5 slivers takes less deck slots than those other combos?  Or is there something in terms of resilience that the 5 sliver-kill has that I can't see?  Would the Disciple kill not be the most resilient combo since once everything comes out due to Protean Hulk's ability, there is no way to stop losing life from the dying artifacts (or is there a way, and I'm just a total newbie)?

Any help to make me understand would be appreciated!

[runeblayde]

Deck space is probably the #1 reason.  Every extra piece of protection you can fit in your deck makes it that much more resilient.  Being able to resolve flash -> hulk is far more important than how the combo finishes your opponent.  I can think of few occasions that the sliver crew didn't finish off the opponent as well or better than the other win conditions.  It is very unlikely that you will run into wall of creatures to stop you from winning right then and there.

[Aardshark]

See my post here: http://www.themanadrain.com/index.php?topic=33095.150.

[botb]

Basically the sliver kill is the hardest to disrupt while taking the least amount of space maindeck. Disciple kill is subject to the same hate protean hulk itself faces, but takes infinite deckspace. The kiki-jiki kill is easier to hate with cards like darkblast/swords to pithing needle and even tormod's crypt.