>>40851463That's if Max Ghost attacks raise special attack, which is pretty likely as the only other type that it would make sense on is Dragon.
Even if it doesn't, Togekiss could run still run Roost to heal after Dynamaxing, Roost is a waste of a slot while Dynamaxed as all status moves become Max Guard.
The build would be max bulk invested and either leftovers or a 50% berry as the item.
You'd Nasty Plot to get +2 Sp.Atk then use Max Air Slash to deal big damage while raising your speed +1 each time. Aura Sphere would be for steels and rock types, as even T-Tar in sand would not like a +2 Max Aura Sphere. If Ghost raises Sp.Atk, you could easily hit something with a Max Shadow Ball to get to +3, and finish your 3 turn Dynamax with a +3 Sp.Atk, +2 Speed Togekiss and then flinchax your way to victory.
>>40851543Dynamax gives it 50% more HP, and it still outruns it. on turn 2. Aegislash will be able to deal some big damage but not enough to KO, Aegislash really won't like a +2 Max Shadow Ball either. We don't know how powerful all of the Max Moves are, but I'd imagine Aegislash, even in shield form, won't appreciate a Max Air Slash followed by a Max Shadow Ball. We also don't know if Max Moves go through Protect/King's Shield.
>Togekiss comes in>Nasty Plots while the opponent switches to Aegislash>Togekiss Dynamaxes and does a +2 Max Shadow Ball the following turn>Aegislash either uses King's shield to stall for a turn, it is unknown if Max Moves will still deal some damage like Z moves or attacks and is probably on very low HP if it survived the +2 Max Shadow Ball>If Aegislash is alive, it either dies to another Max Shadow Ball or potentially Max Air Slash depending on HP, if Ghost raises Sp.Atk (just a theory at this point) and if Max Moves break through Protect.Eventually you'll have a situation where Togekiss's Dynamax has ran out, but now its at potentially +3 or 4 Special Attack and either +2 or +1 speed and Aegislash has taken some damage.
