Buffs;
-Gotta get pom up all the time, not sometimes.
-Using Prestige Pack on your toon? It decreases reuse on your skills substantially.
-Which "Rose"? Paagrio Might right?
-Keeping self buffs up? Essence of Mana/Emp Echo/Wind Stance
-Should be able to use Burst Casting on every boss, save BR for either boss 3,4, or 5. If you have the new Agathion BR, even a lvl 1, you could use ISS BR on one, and Agathion BR on another. Always be sure all debuffs are on the boss and buffs are up on you while in BR!
-Angel Touch yourself on bosses 3 and 5, as they like to fear or stun. Boss 4 roots, but dunno if thats an issue, if so, AT here to.
-MP Pots and/or a rebirth agathion as needed.
Attacks;
What attack skills are you using on the bosses? With nukers AOE attacks are stronger than single target skills, Ele burst, updraft destruction, ele storm are bread and butter. Take ele spike off your menu for this IMO
Debuffs;
Are you keeping ISS debuffs on it, as well as your Ruin? That's key to making good damage. Its tough to switch clients and debuff if you don't have a good macro running on the iss doing the job.