Last time I checked my sinx had 100% chance to reflect single target magic.
Plus Investigate DOES reflect. I know pain when I see it (500k on a reflect paladin on 2 fbhs 2 str belts champ).
Skolls+GT + resists > thana TSS either way. If you learn how to play TSS champs are easier to beat than asura champs.
Investigate IS spammable, at least as fast than TSS is.
Asura champs are harder to beat than TSS champs.
Athena, just because asura can kill weak champs with the champ surviving doesn't mean it applies to pvp/WoE.
Just my two cents.
tl;dr i want thanatos back kthxbai