Need help with sigils :D
Sigil of Blood is for lifesteal on critical, which might be a problem with Sigil of Strength, since it’s might on critical. The mainhand sigil always takes priority, so you can only trigger the offhand sigil if the mainhand one is on cooldown.
If you meant Bloodlust, then the two sigils (bloodlust + strength) would work fine together – one is triggered when an enemy dies, the other is triggered on critical.
Personally, I would have a second looks at the sigils available to you. Straight up power is not always the best choice. But, it’s your decision in the end.
I think they will share cooldown, so If one proc the other one will go on cooldown. I tried using Sigil of Purity (remove condition on crit) with Sigil of Geomancy (bleed nearby foes on weapon swap) and they didn’t work very well. Purity would proc all the time so Geomancy almost never went off.