Across Turkish and Italian league, the top OHs are Gabi and Kelsey - no one else is at their current level as a holistic OH player.. They regularly receive at 60-80%, score >15 points and are reliable at key clutch moments.
In the OH bucket behind them are Zhu, Arina, Plummer… Plummer has improved substantially in reception, otherwise, I would put her even a level lower. Arina has completely stepped up for Fener, taking on a huge load with Vargas out for the first half of the season and still not back to her best form.
One level lower, I would include Hande, Ilkin, Cazaute (only if she continues to play as she has the last matches), Herbots, Skinner. These are all elite, reliable and consistent players who contribute meaningfully, and in some matches are stars, but are not consistently and regularly crucial factors for a win.
You talk about "Across Turkish and Italian League" claiming that you put İlkin on lower level.... Based on which input and criteria?
First of all, İlkin is not a defensive OH but an overall complete OH, who is great in both attack and defence and defense.
Comparing her reception stats with Gabi, Gabi has 56% reception while İlkin has 55%
Comparing her attack stats with Gabi has 44% while İlkin has 43%
Comparing their point/set performance, while Gabi has 3,9 İlkin has 4.08
While Gabi scored 339 points, İlkin scored 416 points. (Gabi played 29 matches while İlkin played 33)
While Gabi is having 0.18 serve performance, İlkin has 0.31 (way better than Gabi)
And,
İlkin is about to break all time record of the Turkish League Turkish OH Players, which is lead by legendary Gözde Yılmaz with 450 points with +173 W/L.
ilkin already has 416 points with +212 W/L and needs only 4 points to go on top of Hande, who scored in 2019, 419 points and 166 W/L, while İlkin was suffering from anterior cruciate ligament (acl) at that time, now needs 35 points at least in last 2 or 3 matches to break all times record. Already number one in W/L (if I am not mistaken).
The question is, what else she should do to be in your top list with Gabi?
By the way, not sure how many matches of her's you watched but from starting of the season till the end and up to cup qualification for 5th 6th position, she was the key player of the team and she scored 38 points in last 2 matches against Nilüfer.
Here is the page, indicating the historical success of Turkish OH's in the Turkish League, which you were refferring