Non-limited
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Cloak of Endurance (+4)
Jerkin from arkham sewers(+3)
Silver pendants(galadon graveyard +2 each (+4)
Belt of life (+3)
Juggling balls +2, staff from seantryn +3 (held)
White lily +2 (held)
Malachite rings (+2 each)
Thick bracers (+2)
Wide bronze belt (+2)

Limited but easy to get
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Stamina rings +4 each
Longevity bracelets +4 each
Ring of Fortitude +4 each
Plain Phylactery +4

Every char should be able to put together a rot suit and keep it in a sack.

Enlarge adds a con.

I usually play shifters and most of the health gear has con attributes as well, so its pretty doable to survive -con damnation (-12) and a 24-25 dropping con rot. Once suited properly you can stack two rots and still survive. Shifters should also keep tabs on their low end forms. Some forms have 22-24 con which can give you even more to work with. (in case you are playing an elf or something with low con. If your natural con is near death, just use your shape form and gear. (dont revert once it gets going or it will insta slay you.