You probably need capybara & giant squid from the logit store (the upgrades they unlock give a massive boost to glires & jellyfish) the upgrades from the giant squid are better, but they cost more, so i usually hear people recommending capybara first, so it doesn't take as long. the capybara upgrades for glires will cost a total of 9.65e48 (9.65 Qdc in standard/normal, 9.65LL in custom) entropy, so if you can't get that much then you probably need something else