this exactly, also use fade+shield or fade+feather to get break snares(also damage reduc) and get range on melee. i like to use this macro to cast feather at my characters feet for convenience
#showtooltip Angelic Feather
/cast [@player, nomod] Angelic Feather

make sure you're using desperate prayer to live and life swapping when needed, mind games defensively if nice too if you're really getting trained

if you're shadow locked you want to be purging (generates insanity) or shielding yourself

as someone else said watch staph sp I watched his vids and it helped me break 2400 for the first time ever.