Okay, I went through all the stickers and did a bit of analysis. I'll share some notes.
The p/t stickers follow a pretty straightforward formula. For 2 tickets, you get total p/t = 5-6. For 3, 8-9. 4 = 11-12. 5 = 14-15. 6 = 20 (10/10 only). For 2 tickets, 1 is the minimum number of power or toughness. For 3, 2. For 4, 4. For 5, 6. For 6, 10.
As far as ability stickers, the standouts for me are:
vampire champion fury - 4 tickets for "{2} sac this creature: deal X damage divided between creatures, where x=power." With a deathtouch commander this could be pretty spicy, or just high-power. Either way, repeatable removal and a built-in sac outlet seems strong.
weird angel flame - 3 tickets for "protection from even mana values." Pretty decent protection, evasion, and blocking. Even seems better than odd since tokens and lands are even.
unassuming gelatinous serpent - 2 tickets for "When this permanent dies, return target noncreature nonland card from your graveyard to hand". This might be the most busted of them all. Any noncreature card becomes even-harder-to-remove
The Scarab God, or you can put it on something that self-recurs (
Bloodghast etc) to keep reusing time magic or whatever. Or just put it onto a free noncreature artifact and you have infinite artifact sacs. For only 2 tickets too.
yawgmonth merfolk soul 5 tickets for "when this permanent leaves, create 5 1/1 artifact creatures". Any commander that blinks, or a deck with a blink theme, can make this pretty insane.
Ambassador Blorpityblorpbloop seems like the easiest sticker-focused commander, and he wants to blink, so this seems perfect there.
snazzy aether homunculus - 2 tickets for "{1}: target creature has changeling". Changeling enables lots of shenanigans, but
Sliver Overlord comes to mind. Being able to target friendly or enemy is interesting. Also, 3 tickets for "magecraft: draw a card". Obviously very strong for any spellslinger deck, 3 tickets is a steal.
giant mana cake - 4 tickets for "when this permanent dies, destroy target nonland". Dying is trickier than leaving the battlefield, but on a commander or a
Bloodghast this seems very potent.
slimy burrito illusion - 3 tickets for "double strike". Voltron's best friend.
happy dead squirrel - 3 tickets for "infect". Voltron's other best friend. Plus it works with
Heartless Hidetsugu and other non-combat commanders, so it's even better.
carnival elephant meteor - 2 tickets for "sacrifice this permanent, draw 2 cards". Strong on any commander, but insane on anything that wants to die anyway. Don't even get me started on bloodghast. Also 3 tickets for "when this attacks, proliferate." Proliferate is strong for obvious reasons, and you can play a planeswalker and proliferate before using abilities even.
zombie cheese magician - 4 tickets for "when this deals combat damage to a player, draw that many". Turning an evasive commander into a hand refiller is obviously strong.
unsanctioned ancient juggler - 4 tickets for "indestructible". Straightforward enough.
night brushwagg ringmaster - 3 tickets for "persist". Less effective than indestructible in most cases, but cheaper and ofc there are shenanigans with things that remove -1/-1 counters. Any creature that enters with +1/+1s goes infinite, for one thing. So there's that.
misunderstood trapeze elf - 3 tickets for "hexproof". Straightforward enough.
eldrazi guacamole tightrope - 5 tickets for "you may cast this from grave by paying 2 life". Kinda expensive compared to indestructible, but beats more kinds of removal and you can do etb combos etc.
phyrexian midway bamboozle - 3 tickets for "undying". Better in a vacuum than persist, but less combo potential. They go great together, though.
Does anyone know how to pull these up on scryfall? The only place I've found a good list of them is mythicspoiler.