Yep @ReportofAusterity sadly Clap doesn’t extend Aukuras in the new R9 patch. I tested both the non-attributed and attributed Aukuras to be sure it aren’t caused by the attribute. However, there is a trick to get a close to 100% Aukuras though.
With this method we can get healing and fire elemental damage with close to 100% uptime.
Aukuras is affected strictly by CON only and is based off party members’ individual CON. Formula is roughly described in the post linked. It is a good way to mitigate damage when used together with pdef/mdef enhancing spells (eg Sanctuary) but it is really hard to use as a heal tile replacement. In a party C2 Cleric is still recommended.