+3 Trap claws are easy to buy in hell from Anya, so there's another +6 to your traps right there (that is, if you use them over a Hoto). If you can get +3 trap claws with +2/3 Lightning Sentry, that's a helluva lot more damage.
ya the trap claws are better if u dont need the extra res from hoto. I have shopped 2-3 +3 trap claws and a 2sin 2Ls claws. I think my sins dmg is around 6k with shako, 2trap ammy, +7LS from claws, and viper so there is much room for improvement.