Its attacks are simply infuriating. I don't have a magic shield so I have to dodge its attacks to not take any damage, but it seems like the damn thing is random on top of random. The only one of its three main attacks that I can actually see coming are the ones where it takes out its beam, and that's only because it starts looking in one particular direction before firing. Additionally, I like that attack because I can actually dodge it consistently.
The other two, however, are a complete crapshoot. First of all, it doesn't seem to communicate which of the two attacks it's going to do at all. Second of all, the slow energy bomb attack is completely ridiculous because it can kill me in one hit if all the bombs hit me at once. Third of all, the dodging seems to be completely random because sometimes I time the dodge perfectly and yet I still get hit, and sometimes I mess up the timing but I miraculously escape getting hit. Fourth of all, the previous thing is exacerbated by the thing that annoys me the most about this fucker: some of its attacks come out too early. Sometimes it releases the attack right in the middle of its "charging mah lazorz" animation, sometimes at the end like it's supposed to, meaning there's absolutely no way to time the dodges reliably, because you have to dodge at EXACTLY the moment the attack starts to come out or you risk getting hit (if he's releasing the magic spear things (which, again, I don't even know if those are going to come out or if the bomb ones will), you're GUARANTEED to get hit in that case).
I have a heavy-ish character so I don't dodge fast, but I tried removing equipment to see if dodging faster helped any and it didn't. Still didn't know which attack was coming, still attacked too early occasionally, still got hit after dodging when I shouldn't have, etc. The only time I got close to killing it was when the AI broke a bit and it started switching sides repeatedly, wasting its time between its nectar feedings. Then I died on that one because I ran out of Estus Flasks and I went right back to dying randomly in the following tries.
So yeah, I need help on that one badly. The randomness is what makes the whole boss battle infuriating. I'm also not sure if I'm doing the right amount of damage. I can take out three "big rectangles" of its health (I'm too frantic at that point to count exactly how much damage I'm dealing, so I can't give a number) each time it lands. Is that too little?