Guild Wars 2

Found this S/F build on metabattle: http://metabattle.com/wiki/Build:Elementalist_-_S/F_Fresh_air_roamer

But last time I roamed on ele (it’s been a long time), D/D was all the rage.

What’re the pros and cons of each?

Scepter Focus
-has invuln
-has anti projectile
-has range
-high damage
-strong cc
-lacks reliable AoE
-squishy if played poorly

Dagger Dagger
-has gap closer (long cooldown)
-average damage
-no anti projectile
-good cc
-decent combos
-shocking aura and frost aura
-cleave

D/D ele isn’t awful, it’s just much, much worse than it was because the arcana line’s renewing stamina got double nerfed, making evasive ele medicore, D/D has no anti projectile and a weak gap closer. It also struggles against HoT professions.
Focus is a much better offhand than dagger now, because almost everything on offhand dagger has really long cooldown skills that are either unreliable or weak. Focus skills give the ele invaluable defense tools for WvW, so it is generally better.
Scepter and Dagger are both good mainhands, but Scepter is stronger for damage.

I would suggest you to run D/F for melee/tanky builds, and S/D for hit and run dps build. They are both fun, and scepter/dagger works well if you can time your cc correctly.

S/F is always better if you know how to play.

Personally, playing any version of D/D nowadays infuriates me. Would definitely recommend S/F.