morning sir!
-your thinsulate really should be in good condition
-priceworthy alternative: weezle-extreme plus
-two layers of warm synthetic underwear, helly hansen or odlo f.e.
-argon, extensive pre-dive flushes, IMHO a key point
-neoprene for gloves and hoods shood be in good condition
-I prefer semidry gloves, f.e. camaro superflex 5mm, but also use
-dry gloves, not oversized, latex seal rolls over armseals, use thin 2mm neoprene armwristbands for equalizing
-socks are one ore two pairs of thick skiing socks plus weezle extreme socks
-two ( IMHO a key point ) f.e. first hood is medium size, outer hood is BARE XL zipperhood, also should provide good seal for FFM, old compressed hoods suck
IMHO good for two hours, I use trilam-suit,
heating for longer dives ( I avoid longer dives

)
additionals:
- warm/hot carbohydrate breakfast ( f.e.pasta ), low fat
- hot selfmade chickenbroth with ginger, also inbetween dives
- break for hot lunch if possible
in summary, my personal key points are:
- good, hot food during the day, enough sleep
- argon flushes predive ( extra bottle ),
- reduced suitgas-exchanges during dive
- double hoods, mint condition neoprene
- Rebreather
enjoy!
