Well I've never tried overcloaking but I've read the guts of cloaking and 1+1=2. so...
As I understand it overcloaking is using one ship with far more cloaking devices than it need to achive the 98% max cloaking and fleeting it with un- or less cloaked ship so they become cloaked too ![Smile](images/smiley_icons/icon_smile.gif)
The formula from the help file is
total device(s) cloak units * empty ship mass
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other ship(s) mass + cargo mass + empty ship mass
which gives a result that is then chewed by what appears to be a 1/2 root function. no matter...the idea is to make this number as big as possible. 1000+ = 98% cloak
The obvious means are:
More cloaking devices.
More overcloaked ships.
Less cargo.
Less other ships.
The sneaky one however is that if you make the unladen weight of the overcloaked ship as high as possible it will dampen the reducing effect of the cargo and other ships' mass to give a higher result. Off the top of my head I'd guess a nubian with tritanium armor. But a maxi-miner with those heavy mining robots...