I stripped all non-JPA entity logic out of the evaluation - Cold start server, Arquillian test deploy, create 55 entities.
-- Sequence DDL:
CREATE SEQUENCE SEQ_MYENTITY
MINVALUE 1
MAXVALUE 9999999999999999999999999999
INCREMENT BY 50
START WITH 3587601 -- < Indicates any nextval values should end with 51 or 01
CACHE 20 NOORDER NOCYCLE;