Here is a variation I came up with on stacking the deck using a haymaker or milk build stacking shuffle. The problem with the typical description/method shown on YouTube is that often all four Aces are placed on the bottom and then stacked with four consecutive Milking sequences; I.E. milk run three, milk run three, milk run three, and milk run three.
This results in a rhythm that looks unnatural and draws attention to the shuffle. I removed two of the milk run three sequences.
Start with three aces on the bottom and one ace second from the top. When performing, I will have the spectator shuffle the deck, then take it back and do my “two step cull” to get the four aces to the top of the deck. I then double undercut three aces to the bottom and do a single riffle shuffle to add one indifferent card to the top, above the single ace.
To begin the overhand shuffle I take the deck in my right hand and draw off two cards, together, and then run three more. This stacks the first ace onto the left hand. Then I milk shuffle, drawing off the top and bottom cards, followed by running three cards.
Here I bring down the right hand to begin another milk run, but I pause briefly before raising my right hand and milking the top and bottom cards. This pause is simply to break up the rhythm. Then I do the second and last milking sequence, drawing off the top and bottom cards, followed by running three cards.
I run one more single card, outjogging it over my left first finger and shuffle the remaining cards off, keeping the last ace to the end of the shuffle and shuffling it on top.
My right middle finger then comes up under the outjogged card lifting the upper portion of the deck so my right hand can grip it to continue to overhand shuffle. I run five cards (stacking the last ace), pause and then run three more, outjogged the next, and shuffle off.
To end, I grab the cards under the outjogged card and commence the last overhand shuffle, simply running three cards and throwing the rest on top, which brings the stack to the top of the deck.
Here is a video of a practice session: