plantera down. took a number of tries.
First try, I took way too many hits from her spiting at me. had a hard time seeing them. green on green... pretty much died instantly in phase 2, as she transformed right on top of me.
more tries, did better at dodging, but still got taken down fast in phase 2. She kept getting stuck and not pathing/following properly. and would cut me off, forcing me to swap rotation, which would fail occasionally.
Tried making the arena slightly bigger. it helped, but not really enough.
At first, I considered using a large rail system, that spawned in the jungle along with a large vertical cavern, to turn the entire jungle into a path to take her along. But working on extending, and streamlining it, I was getting poked by hornets too much, and wondered if it was going to be a solid choice...
Decided to give the premade arena one more shot before bed.
Two big changes for this last attempt. black spot flying mount, and inferno potion. (I had used it a few times.) and meteor staff. I modified the top of the arena a bit, to ensure meteors would not impact outside of the arena, and would come down in.
ship did the most work. phase 1, venom staff shotgunning is very high dps vs her. but its range is short, so got to get dangerously close. its raw dps is just about 2-3x everything else though. so, worth it. phase 2. dont remember which i focused on. nimbus rods were still going. meteors were ok-good at killing her adds, when there are alot of them. not great at finishing em off. venom staff piercing spread is decent at that, but again, requires being in close. its high dps for burning her down, was def the finisher, as I got more of the adds down. may have used rainbow staff a bit, for its autotarget too, vs tentacles.
She was getting on top of me way too easy still though, and often had her claws/tentacles blocking my rotation. this is where the black spot was invaluable. flying up and down through the platforms, unimpeded, and even precision flying around the tentacles, avoiding them, threading needles.
Also obviously farmed pirate maps, and did pirates a few times before this. very easy with meteor staff, nimbus rod, and afk lava pit farm..
A few solar eclipses as well.
Still haven't managed t2 of old mans army. venom staff was most effective. harp is too slow. probably really should have farmed the 25 medals in t1, to upgrade to t2 sentries immediately. fully buffed, venom staff was still only getting to like round 4. im not dying, but keeping sappers/flyers off the crystal is not going well.