plan ahead, if you wanna make a new char in the future, create a lvl 1 and buy stuff for it too (for example lifestealing wep ench for lvl 10 monk twink)
buy big bags + reagent bag
buy mount equipment like water walking or 20% increase mount speed
buy enchants like hidden satyr
buy SL gems and gems in general
buy PvP transmog in Area 52 from Blaze Magmaburn and nearby vendors
buy drums and oils/stones for 1h wep enchant
I took him down to about 100k HP and then the heart spawned which I took down by 2 Moonfires. Right after heart is killed, the hard-mode is activated and for about a second and half boss still had 100k HP - and this was the RNG phase - so pray for crits to one shot him down or he will get 11 mil...
Algalon was quite simple. The hardest part was XT-002 where you need some RNG to play in your favor. I managed to take him down on about 8th pull. I went mostly with full heirloom haste/crit gear. I used defensive abilities on pull like Barkskin and Survival Instincts to survive, then the Totem...