Pilot Archive

This might be a noob question i dunno been running the imp pilot missions and the quest sent me to Lok where i got jumped by teir 3 z95's i fought the one for probably 15mins and could never get its sheilds below 97%. I am currently 1111 imp pilot but i was 3322 rebel pilot for a time and never had this problem flying a Y wing or X wing any info would help thanks