For Me Americas and Pacific Ascension would be more competitive compared to EMEA ascension
America's Because the tier 2 NA is so strong and Tier 2 SA looks good too
In Pacific Ascension Teams from MY/SG , JP ,KR looks strong to fight for that 1 Spot. I don't really know about other regions . Though South Asian Region might be the weakest in the league but the only 2 teams that can qualify are OG and VLT and Both have Good import players which can fight for that APAC ascension spot.
EMEA ascension Would be doomed. I don't really know any good teams apart from ACEND and Parla eSports