After seeing all-Archer and all-Cleric FSP videos (you know who you are if you're reading this), I had to do it with Venomancers! I was considering a run like that for a while now and the videos mentioned just now made me decide to finally do a test run.
Venomancers can actually do FSP effectively if they are organized and have a few evolved Hercules' along with at least one good-geared player that can tank the last boss. My run wasn't fully organised and it was a bit chaotic at times but we managed to do it successfully thanks to everyone's efforts.
Here's some details on how we did it and what were our plans:
Toad Boss Plan A - Take turns in Herc-tanking This was the original plan I had suggested which can be very effective in tanking as long as the squad is organised and coordinated. During the test run we kinda panicked, messed up a little and ended up failing our first attempt but it worked great towards the end.
The squad will need about 2-3 evolved Hercules but having a couple more of those for back-up is good. One Venomancer starts tanking the boss with the pet and after the Toad uses the "Barbarian" attack which kills the Hercules, the next Hercules-in-line takes over. Thanks to the new aggro-stealing skills the pet has after evolution, it's easy to do it.
Plan B - A Venomancer tanks the boss A Venomancer with good gear tanks the boss and has to Triple Spark at every "Barbarian" attack to survive.
Chi can be provided by other Venomancers if necessary. This one is a little tricky but can be pulled off. Of course there's also Genie skills and pots to assist if the person can't Triple Spark in time.
We started out with this plan during our second attempt but our tank eventually died so we immediately switched back to Plan A and took turns in Herc-tanking.
Another way of doing it is by having Venomancers take turn in using Expel on the tank before the critical moment but this also needs coordination.
Plan C - A Venomancer tanks, a Hercules helps My game husband Eoliana suggested this plan but we didn't try it out during the run.
A Venomancer tanks the boss and right before the critical moment (the Barbarian attack) another Venomancer uses their Hercules to force pull aggro off the tank and have the boss attack/kill the Hercules instead. After this, the tanking Venomancer resumes tanking.
Notes: Someone will have to be on the Axe duty (obviously). Use Fox Form attack skills to kill the Axe "mob" and pick the Axe item.
The person with secondary aggro will have to purify themselves in whichever way possible, due to the lack of a Cleric. If they are Sage, they can use Sage Summer Sprint. If that's not available (cooldown, skill not learnt) they can Triple Spark. If they are Demon, they also have to Triple Spark.
Since the squad is full of Venomancers, chi can be provided to whoever gets the DoT.
Succubus Boss Someone who has a pet with the skill Shriek or someone who has the genie skill Earthqauke has to be assigned as the one to interrupt whenever the boss is about to heal.
There is a message in big yellow letters that warns you about it so it's pretty easy.
I'm not 100% sure yet but pets don't seem to count as a target. Nobody died during "stay dispersedly" even though they had their pet with them. Despite that people still pulled their pets away from the tanking Venomancer just to be sure.
Last Boss Pets get auto-killed from full chi during this boss so this must be tanked by a player. A Venomancer with decent gear can do it.
Blazing Barrier, Bramble Hood, Feral Concentration, genie skills and pots should be used if necessary. During the "I AM HYSTERICAL!" phase, it's better if the tank uses AD or any other immunity. Even if Venomancers are going to Purge the buffs...the boss can still kill you in those few seconds.
Final Notes: This was supposed to be for the video description but I might as well write everything here.
Our squad had two R9rr +10 Venomancers (with some NW upgrades), two R9rr +6-7ish (I think?) Venomancers and the rest were Nirvana G16 with various refines and shards. I think one of them was G15 Nirvana.
Here's the list of people that participated in the test run: Eoliana, Rutaett, FoxyRaimey, SoulTira, jEnNYpHeR, YumekaPL, Teiw, Lola_Basyang, babefire, Heleni (but left at the Toad boss) and me.