Overview
Absorbing Man is an interesting deck building challenge. He wants to be in a deck with a lot of good On Reveals for him to copy. The trouble is most of the best OnReveals belong to 5 and 6 cost cards (Your Dooms, Aero, Leader etc..) This means he has great high roll potential but could be underwhelming when you're unable to cheat out those high impact cards. I think ideally he's in a deck where playing him on turn 4 to copy the OnReveal of a 2 or 3 cost card is still really impactful to winning. After a bit of thinking Ive landed on Move as a good home for him. The reason is that Move runs a ton of low cost OnReveals that aren't game changers by themselves but when combined with other Move cards generate high value. Let's go over some of them.
Cloak
Obviously a great enable for Move synergy with cards like Kraven, Vulture etc. What's cool about Cloak into Absorbing Man is that you can move all your cards to the Cloak location and then play A.M. in the lane they just left so that you can move them back. This opens up a lot of potential mind games with the opponent especially if you play Cloak turn 4 into A.M. turn 5. On turn 6 they'll have no idea where your power is gonna go.
Hulk Buster
I have to get confirmation that this works the way I think it does, but if I'm correct, playing Hulk Buster into Multiple Man and then Absorbing Man into that same lane will cause Absorbing Man to merge with M.M. as well bringing him to 10 total power. That's a strong play line for turns 2, 3 and 4 and leaves you to play Dr. Strange and Cloak on turn 5 and a Heimdall on 6 to spread a bunch of high power Multiple Men around. If I'm wrong, and it seems like I might be because Hulkbuster merges underneath the card you play it on meaning the cost and identity of the joined card is of the card HB merged with, then instead of Hulk Buster another Move synergy card can be run in it's place (and probably Multiple Man can be removed from the deck).
Dr. Strange
Speaking of the good doctor, he's another card that Move decks might sometimes wish they had more of. Absorbing Man could make that wish a reality getting an additional trigger on a card like Vulture or Dagger.
Aero
Aeros ascendance in the current meta has been pretty swift and for good reason. She offers incredible disruption that can completely wreck a turn for the opponent (and net a Kraven trigger). Being able to essentially play a second Aero on turn 6 could put your opponent into "checkmate" situations where they're unable to put cards in the lanes of their choosing on the last two turns of a game.
Additional Synergies
This section will just discuss other cards Absorbing Man has synergy with that might fit into a Move style deck or might not.
Kingpin
A downside to playing Kingpin is that opponents will usually try to fill his lane to avoid the possibility of having their cards destroyed. Absorbing man can help prevent this in a few ways. First is that players going against Kingpin know to fear Aero on turn 6. With Absorbing Man in hand you can play Aero turn 5 and then surprise them on 6 by pulling their cards to their doom with A.M. Another way he could help is by playing him on turn 5 as a second Cloak. When Kingpin moves on 6, so does his kill effect. Having Cloaks ability in play on 6 with Kingpin on the field and Aero in hand turns it into a bit of a guessing game for the opponent. Will you move Kingpin or not and where will you play Aero? This is a strategy that's technically doable now but it means you would have to avoid have playing Cloak earlier in the match. With Absorbing Man you can play Cloak on the crucial turn 4 into places like Kyln and Stormed lanes, buff up your Move cards like Dagger, Vulture or Kraven and then still pull off the Kingpin Cloak Aero mixup with Absorbing Man.