The affix kap does not come after a bahuvrīhi samāsa the last member of which ends in the affix īyas,
This debars all the previous rules. Thus बहवः श्रेयांसोऽस्य = बहुश्रेयान्, here rule 5.4.154 is debarred. बह्व्यः श्रेयस्योऽस्य = बहुश्रेयसी, here rule 5.4.153 is prohibited. By rule 1.2.48 the long final ई ought to have been shortened, but this is not done by considering it as a masculine \ईयसो बहुव्रीहौ पुंवत्\ See Vartika under 1.2.48.,