Summoner getting ganged up on

[LiraelClayr]

Hi! I'm pretty new to all of this. New enough to where I'm still learning the lingo.

I have a lvl 55 summoner, and I am having real trouble with solo missions where I'm ganged up on, like on a quest in Castrum Centri where I had to trigger a battle and got immediately hit by four or five enemies at once. I tried that one 5 times and died each time, until I gave up and asked someone in my FC to help me.

I'm using Ifrit-egi, Surecast, Ruin II, Bio III, everything I know to use. Physick can't keep up with the loss of HP, and I'm doing my best to stay out of AoE attacks. I've gotten some good armor via Allegan tomestones at Revenant's Toll, so my item levels are at somewhere from 70 to 130.

I'm just not sure what else I can do!

Thanks for listening.

ETA: Thank you all SO much.