I played the thrower intensively both champ hunting and boss hunting. I have done solo all fel spawns but semidar (I am male...). I didn't give a go to the ilsh or malas spawns.
I tried the boomerang but the damage is so bad that I gave up pretty fast. I am currently using the soul glaive for the whole spawn. Despite a speed cap of 1.5/sec instead of 1.25, your damage over time is simply better. The special of the boomerang didn't seem to prove useful.
So, I am using a soul glaive for everything but pvp, and the basic is 30 SSI. Then I also use 40 DI for pvm in order to reach the 100% cap.
I stopped using wraiths form, since it makes you slow, and many spawns dont have mana anyway. The only encounter I use wraiths form at is Slashers. (spam AI).
I have the conjurer's trinket, and for any spawn other than undead I use Slayer. If I fight undead I replace slayer by hit stamina leech. All my weapons are 100% elemental focused on the weakest of the spawn type.
So, DI/30SSI/Slayer or HSL/HML/ and the last one depends whether I do a boss or spawn. For spawn the last one is HIT AREA. For boss it's either HLD (despise I have MS) or HSL.
I hope this helps.