Originally Posted by Zandel

Rewards for Raid bosses (ALL RAID BOSSES) is based on BOSS LEVEL and NOTHING else. You will ALWAYS get the same rewards for 2 bosses of the same type and same level. Be aware that this event has TWO (2) types of boss tho, the under lvl 80 bosses and the lvl 80+ bosses that look like a normal Giant Wasp.

I didn't keep track of the levels and record the # of nectar. Looking at the present history. Seems pretty random to me for how much you gained.