I just recently did those ***trials.
I advise you to try on apex mobs as they are sturdy then you can save you time of rushing to next mob. I used to do like 50 ws before it was dead.
Another tip, favor Arciela 1 for trust because she will favor haste 2 on RNG or COR instead flurry like the others RDM trusts do. King of hearts also do that i think.
Arciela I will haste2 shooting jobs, but NOT weaponskill.
King of Hearts will haste2 shooting jobs, but WILL weaponskill.
This means if you're self chaining, avoid KoH. If you're not, really doesn't matter much either direction. KoH might heal more than Arciela.