Complete Healing:
Attack skills
Biological metamorphosis 52 %
Matter metamorphosis 48 %
Yet it doesn't start healing more if I get higher BM MM.
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Candycane:
Attack skills
Matter creation 100 %
Has a constant damage (540 pvm per 'hit'), but it doesn't start doing more damage if I only get more MC.
Both of these are easy to check. That theory that it is based off the Attack Skills of the nano just doesn't hold water, or else other nanos would have a similar effect.
While you are right that the nano's AR gets calculated off these attack skills (chance to LAND the nano), nano effects don't scale if you get more nanoskills. And a nano that you don't meet the requirements for, doesn't go OE, you can't cast it at all anymore. They're two different things man.
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But anyway, also this theory is easy to check - make MP cast Biazu, let it crit a leet a few times. Note values. Terminate pet, cast CI or CM8 on self, recast Biazu, and let it crit a few leets again. Note values.
I honestly DOUBT you will see any sort of difference. At all.
PS: Keep in mind that base AR isn't everything - that typical 201+ MP pet has
Evocation of the Enraged running permanently, which is a +500 AAO buff. Also pets don't have to perk, they can land regulars np. Haven't you ever landed burst or something on a fixer? I also hear frequent complaints from crats that they get hit with around 7k evades (Dodge the blame perk up)... so. Go figure.
Lupusceleri L220/24 Agent.
Silversmith upcoming TL5 twink.
Wolfseye L110/12 Adventurer (towertwink).
Lysdexic L90/9 Agent (Mimic Enf towertwink).
Aesculapias L21/2 Doctor (ancient).
Aaaand various other alts.