It depends on if youre going haste or mastey build and on if youre close to killing Elegon HC. If youre going haste build and are not close to Elegon HC, upgrade LotC if youre either going mastery of close to elegon HC upgrade Relic.
Look at Simcraft results and do the fundamental scaling math (this is a general announcement)
The BiS N/HC Trinkets are:
EOT HC 2/2
EOT N 2/2
Only use LOTC HC Trinket if you don't have either DMC or EOT or you have LFR EOT.
The haste procc far outvalues the static haste on LOTC for various reasons:
- The higher your gear level increases the better you scale with intellect which pushes DMC upgraded very high
- Even if the procc on LOTC is slightly higher than DMC the static 1k+ Intellect from DMC will scale off into all your damage vs. the static haste which permits a little more mastery through reforging
- If you use LOTC over DMC the mastery reforging is never as good as the static Intellect loss
- The LOTC procc is based off dots and if you are using NT, if it does not procc and if EOT doesn't procc you push out an extremely delayed and poorly prepared burst
All the above holds true for arcane.
Lastly, why do I mention the haste problem. If you are a Troll, you should not go past 3967 haste because with 3967 haste you get:
+2 Ticks LB / +5 Ticks NT outside of Berserk/Lust
+Cover all extra ticks during Lust & Berserking (I don't remember the exact amount of the ticks off the top of my head)
+With all CDS and EOT procc you sit at 0.96scast on AB which leads to GCD CAPPING and more haste is simply not a dps gain (simm it and practice it!)