So, I played one match, and I'll try to be objective. Unfortunately, I'm not willing to try 9 more to give it its fair chance...
Now, to start, I will be clear that my team had 2 in a party and 3 solo...the other team had a full party, and they definitely knew what they were doing. But, see, something like that shouldn't be an incredible hindrance to holding your own, or doing okay as a team. But it was.
Compared to the normal builds I use (18-20% move speed), it felt EXTREMELY slow (which it was). I just cannot do 0 move speed, not when the other 9 players have it. If you get to the middle of the Arena map, even if you have Lacerate up, and you have Purification or Sanctuary...you're going to get caught if you're focused. That's what happened to me in the first 2 minutes or so. You just can't get back to base quickly enough. 200 health from even a full Runeforged Hammer can easily be erased in 1 good ability...and 200 health with no protections gets demolished in the late game.
It took a long time to get items built. With no mobility, getting back to lane takes a long time, which means missing out on at least 1 wave every minute or two. Starting only 30 power, or 60 with 2 items, just wasn't enough to easily clear the wave by myself. My standard Arena build gets move speed to 20% by item #2... Heartseeker + Hastened Fatalis. Heart, by itself, gets me 25-65 power by itself...plus move speed.
Oh, and they definitely knew I didn't have move speed. I had to burn my Lacerate every time Khepri tried to stun me, or I was going to get pulled and focused (and killed in 2 seconds). That put me too far from a teamfight to do anything, and trying to get back in it took a while (because...I didn't have move speed!). And, consider, going back in after using Lacerate means I now have no escape, and no move speed to possibly keep distance if I need to run. This is, very specifically, a bad thing.
With regard to Poisoned Star second...having it be the only crit item until item 5/6...the crit proc is, unfortunately, just NOT reliable...15% only, and she has no other boost in her kit to increase that chance (like Jing Wei or Artemis). So at that point, you're relying on others' slowing abilities to activate the additional damage passive from Runeforged Hammer. Poisoned Star, I absolutely sustain, is a 1 v 1 item that's best for Assassins. Not hunters.
I was only able to finish up to Brawler's Beat Stick (item #4) before the game was over. Were there other issues? Yes...my team forgot about the minions a few times...but my problem was, I couldn't GET to the minions quickly enough sometimes to clear it myself, and my clear just wasn't powerful enough to make minions a non-issue, at least in the early game. Oh, and I was dead a lot. 8 times, in fact. Fights mostly happen in the middle of the map, and with relics down (and the ones that often save you are down a long time), they're just not reliable enough to save you unless the entire rest of your team converges and blocks them.
In the end, could I have done better, score-wise? Yes. I could have played more conservatively...but at that point, it would have been like a pseudo 4 v 5, and sorry, that doesn't win matches. I could have had better teammates, or seen less synergy in the enemy team. But you need to have a build that can compensate for potential issues. In this case, it can't compensate much...true effectiveness and safety of a sort would be if my team had something strong to peel enemies (e.g. Confound), and they all were very aware of my situation. So...I could make this build work with some planning from my clanmates...but it would be a forced "working" status.
I also could have developed more familiarity with the build over time, but the idea with a strong build is for it to be universal enough that people can, with little practice, make it work well, given the situation. My total player damage in this game was around 16,700, with 0 kills and 8 deaths. My average, per Smite.Guru, is around 27,000. So, if I can MAKE it to late game...I can get my damage up...but damn if my early and mid game with this build just doesn't provide enough damage. The Executioner 3rd is also just not cutting it...so little damage until later, that I would delay this item and go straight into either Brawler's Beat Stick or even Malice, as crazy as that might sound.
In conclusion...this isn't meant as an insult to you, and I'm not saying this build isn't working for you, right now. But at level 28, I'd say you're not fully categorized into the mainstream of matchmaking. You may have better skill than the peers you're playing with/against, and that might be helping you right now. But given enough time, I predict your competition level will go up, and you'll start having some very specific difficulties with the build as-is.
I hope you take this constructively...I really don't mean this to be bad. One game may or may not be enough, and my overall skill level could possibly be less than yours, but I think I have enough experience at this point to recognize the most obvious things. This is an extremely situational build, at best, from my point of view.
