Sigil of Strength vs Sigil of Force
If you have 15 nature magic go with strength.
Jade Quarry – Team Savvy – #1 NA WvW Solo Guild
If you have 15 nature magic go with strength.
Fortifying Bond was the first thing that came to my mind, too. However, the complete answer to the question also depends on your how often you crit, and if you are decent at pet management, and probably some other things, too.
On-crit sigils don’t give much bang for your buck if you’re not critting frequently. And, if you use weak pets, they’re dead, on passive, etc., you’ll lose whatever benefit you could have gotten from from Sigil of Strength + Fortifying Bond (available only if you have 15 in Nature Magic).
Be sure and explore several sigil options before making a choice. I have Fortifying Bond, but prefer Sigil of Battle oh my sword, which means 2 more stacks of Might on me and my pet, for twice as long on me (20s on me, 10s on pet). I’ve usually swapped back to short bow before the 20s are up, so it’s a no-brainer for me between Sig of Strength v. Sig of Battle.
sigil of battle is a more reliable way of granting you and your pet might. You can easily get 6 stacks of might for yourself through weapon swapping on cooldown. 9 if you take some boon duration.
Also, if you check the wiki, fortifying bond is effected by boon duration.
My personal experience with sigil of strength is I’m able to get on average 3-4 stacks of might with about 50% crit chance. Sigil of strength also has an internal cooldown.