Alright. I made an account on this forum solely to ask if anyone has defeated the fire Guardian.
I have tried several tactics but his ability to regen just really outstrips my ability to deal dmg. I have seen a lot of tutorials but they all involve tinker's Construct OP weapons. I have gotten pretty far in all the quest lines except Thaumcraft (mostly because the 3rd or fourth quest reward did a beautiful job of screwing up the aspects for me) but I don't know of a way to handle this guy.
Any help would be lovely and I'll offer any advice that I can if you have questions.
From my knowledge of AM2 I got playing TPPI your best bet is honestly a complete cheesy method unless you are really really high level magic wise
1st things to know he doesn't heal passively he is healed by fire damage he also casts firestorm on himself/his target when he is in combat. AM2 is really well build for progression so i would advise having all the the boss relics up to this point on you as well as they help (mostly talking about earth armor but the nature scythe is amazing also and the arcane book gives a 20% mana cost reduction)
also needless to say invest in some good enchantments of magic protection 5 and fire protection 4 as well as a botania crimson pendent
CHEESE IT: build a room for it to be in and a room near it you you can be in with some form of regeneration and where you can stand in a pool of water.
make sure that his room is FULL OF COBWEBS and nothing for him to agro on this will greatly reduce his movement as even epic bosses fall slowly in webs then as far as the killing him you have a few options.
1 make pistons that once he has spawned you can activate to cover his head with a block and slowly suffocate him this will eventually kill him as long as he doesn't agro on anything and cast his firestorm.
2 some method of poison works well on bosses its slow but its sure botania can help you here but you will need a way to deal the final blow (dispenser with arrows might do the trick or a penetration shot to shot through the wall make sure it will kill him if you use this method)
3 make it fight the other bosses this one is MUCH MUCH TRICKERY but in short make a arena and spawn in a lot of the bosses at once as well as ONE fire boss (FOR THE LOVE OF GOD DO NOT SPAWN TWO FIRE BOSSES AT ONCE THEY WILL BECOME NEIGH IMMORTAL)
ARCHMAGE PATH: projectile blizzard dmg+ dmg+ dmg+ should kill it in about 5 sec but costs a lot of mana
OVERKILL SPELL: Self gravity Zone projectile blizzard damage damage damage
this will make a zone at your feat that anyone standing in will shot blizzard spells like a machine gun (this might not work i cant remember if this is the right order or not)
Helper spells:
Shrink will half the physical damage dealt by a creature
Snare helps with hitting the thing with your blizzard
projectile recall can help move him to where you have your mark good for setting traps