Hi again! Hope ya don't mind me inputting some thoughts again.
For A-Ampharos, its base stats are almost identical to its regular counterpart except that its defense and special defense stats are swapped. Generally you probably want 31 IVs in all its stats unless you want to run a trick room version - then you would want 0 IVs in the speed stat. For EVs, you can invest special attack and hp and run its main stabs, which are blizzard (I don't think it can learn ice beam via level up and there's no TM atm) and thunderbolt/thunder. You could even try going for a defensive set since it gets Filter as an ability and cotton guard.
All three A-Pallosand forms have identical base stat totals with its regular counterpart. It's pretty similar to A-Ampharos - slow, bulky, and specially offensive, so you can run a similar EV and IV spread that I mentioned above. Personally, I was able to catch a shiny one (rock form) with Solid Rock as its ability, bold nature, max HP and defense, and the moves being recover, giga drain, shadow ball, and power gem. Yes I am a big fan of stall >:)
Anyways keep asking away and enjoy team building!