Rengar's health regen is pathetic

Rengar: 4.27 hp per 5 at lvl 1, 11.1 at lvl 18 Irelia: 8.59 hp per 5 at lvl 1, 19,6 at 18 Yorick: 8.175 at lvl 1, 20.1 at 18 Renekton: 7.96 at lvl 1, 20.7 at 18 Warwick: 8.39 at lvl 1, 22 at lvl 18 Nunu: 8.39 at lvl 1, 22 at lvl 18 Maokai: 8.675 at lvl 1, 23.1 at lvl 18 Source: http://leagueoflegends.wikia.com/wiki/List_of_champions%27_health_regeneration

Everyone of those other champions havebetter sustain than him in their kit, yet they have more HP regen per 5 and per level. With the new jungle shitting on Rengar, he really needs some help.