Are there any good resources on utility for your 2nd set?

I got one for you.

Figure out how to break armour (if you don't already).

Since you're already a bow build, this will work great.

Back bar a Crossbow with the highest physical damage hit you can get. Use High Velocity Rounds against an enemy with fully broken armour.

HVR will apply Riven Armour for a base duration of 5 seconds. Every hit made against the target for that 5 seconds will have 5% of the HVR hit added to it.

It'll make your poisons have an extra hunk of base physical damage behind them for as long as Riven Armour is active.

All you gotta do is tap HVR button once armour breaks and then do your normal rotation.

Usually I go Thunderstorm in 2nd weapon set, guarantee shock with Shock Conduction II. It can come with some extra effect :

- Critical weakness : Effigy of cruelty + high crit chance wand, socket pinpoint critical in thunderstorm.

- Elemental Exposure : Whispering ice. Invest point into exposure effect can give very very high -res on enemies.

For attack based build I always go for Critical Weakness setup.

I have some generic examples that probably won't apply to your specific build:

1. Curses: get all the curse-related nodes you can. If you use blasphemy on your main it won't be as strong. If you use blasphemy on both, it will apply different values according to what set is active.

2. Duration: get your main set with reduced duration and your weapon swap with increased duration. Works really well with a Titan, Time of Need + Fusillade on your main and flame wall, curses, storm on your swap.

3. Bossing vs clear: get a set with everything dedicated to bossing (more damage, less area, more survivability) and one set dedicated to map clear (more area, more speed, more projectiles).

4. Totems: if they complement your build well, invest everything of your weapon swap into totems. The best example is ED/C with Dark Effigy.

5. Thunderstorm: invest everything into area, duration, lightning damage and most importantly shock magnitude.

6. Hand of Chayula: get a staff and put all your nodes into curses and marks. Apply them with HoC on weapon swap. Only works if you do it rarely against single targets.

I like two: talisman for leap and crossbow for grenades, earlier on so you don’t have to go out of your way to spec into dexterity. Grenades can hit pretty hard and with multi shot you just spray toward the mob you’re about to fight melee…and with some bosses you can just run around in circles firing grenades and being patient if you’re worried about dying.