I'd say skip the lobos. Rol/Hope is not the best way to grind FG's. The most cost effective way is to start with liquid antimatter and then move on to instosis. But seeing you already have Rol/Hope, it's probably best to just grind until you can upgrade 6 supernovas, 6 time towers and 4 electrum hourglasses. Don't spend any more money upgrading Rol/hope because the cards used are not very flexible and can't be easily used in other decks. Then you can use antagon's grabbow or another good bonze grinder to get 4 shards or readiness to build a half upped Instosis. Maybe you can start grinding bronze now, and if you happen to get lobos while getting the shards, you can use it for rol/hope.