Last time I flew to Egypt with EasyJet I took the following in hand luggage in a cabin sized wheelie.
2x Metal Ratchet Reels with Line (75m and 125m)
1x GreenForce Battery, Umbilical, Head and Charger
2x Hollis Backup Torches
1x AP CCR Rebreather Electronics (ie the 'head')
1x S/S Backplate (with harness)
2x PDC Computers
4x Regs
1x Laptop
1x iPad
1x GoPro
6x Boltsnaps
1x Wetnotes and Wristslates
1x Compass
+ Cables, phone, wallet etc etc
25.7kg if the scales were right...
The ONLY thing I was scared that would be looked at was the Reels and the 200m of line on them.. obviously all the alarms went off when it went through the X-Ray, but on explaining everything, what, why etc the security guy was helpful and apologetic as he could see I had packed it tight and had to repack it it after.
Torches...if in UK/EU say they are 'torches', if flying anywhere else, you say they are 'lamps'.