SGE has the lowest HP in PvP along with a tool that encourages them to be in melee (Phlegma). Not having Kardia on yourself during the neutral game is just asking to be blown up. Aside from that, it tends to be hard to bounce around Kardia on whatever target that needs it, so at that point the SGE's best bet is to try to draw enough fire to break their shield and get an addersting stack.