Based on the total ratings provided, the horses would be ranked as follows:

1. Dunum (IRE) – 484.0
2. All Lies Ahead (IRE) – 404.7
3. Earls (IRE) – 398.7
4. No More Porter (IRE) – 383.2
5. Flame Of Eire (IRE) – 372.4
6. I Am Superman (IRE) – 363.5
7. Saltonstall – 356.8
8. Final Voyage (IRE) – 344.5
9. Gambe Veloci (IRE) – 338.8
10. Point Gellibrand (IRE) – 335.5
11. Tosen Wish (IRE) – 335.2
12. Pierre Lapin (IRE) – 326.9
13. Current Option (IRE) – 312.2
14. Loingseoir (IRE) – 301.5
15. San Aer (IRE) – 297.0
16. Coins Cross (IRE) – 291.2
17. Vocal Studies (IRE) – 284.6
18. Adelaise (IRE) – 276.9
19. Howyoulikethat (IRE) – 275.7
20. Rahmi (IRE) – 273.4

From these rankings, it seems that Dunum (IRE), All Lies Ahead (IRE), and Earls (IRE) would be the top contenders.

Dunum (IRE) tops the ratings at 484.0. The horse was very progressive last term and it returned to action with a win at Limerick 5 weeks ago. This suggests the horse might not have reached its limit yet and is certainly one to watch.

All Lies Ahead (IRE), with a rating of 404.7, is another top contender. It recently secured a good second-place finish at Cork, indicating solid form. Its stable is also reported to be in good form, which bodes well for its chances.

Earls (IRE), with a rating of 398.7, recently secured a career-best win at Cork. The horse managed to come around the whole field to secure this win, showing tenacity and skill.

Among the rest, although No More Porter (IRE) and Flame Of Eire (IRE) rank high in the total ratings, they don’t have such promising comments compared to others.

However, Gambe Veloci (IRE), rated 9th with a total of 338.8, is worth a mention. It recently demonstrated a career-best performance when winning at Limerick. The fact that the trainer is going well and the horse is now moving to handicapping could indicate potential for improvement.

Finally, Loingseoir (IRE), although 14th in ratings, put up a good performance finishing second at Leopardstown recently and could make its presence felt.

In conclusion, based on the total ratings and the horses’ recent performances, the top contenders in this race seem to be Dunum (IRE), All Lies Ahead (IRE), and Earls (IRE), with Gambe Veloci (IRE) and Loingseoir (IRE) as potential surprises.