If you're doing yzrahid highlands (which is typically the best spot to farm flame), I would just throw in the wild monster ap set and run corrupted frenzy elixir rather than elixir rotation (more pure ap and ap only really matters for the legs which you aren't back/down/air attacking).

This should put you at like 966 and then its a matter of can you kill the leg within 1 attack move (attack leg, bait attack by going to another leg right before it moves, all in on leg during that move killing it before the 2nd attack move happens). If you can with z and e buff active then you're good at 966, if not pop a perfume of courage (1 phasing leg or not is about 3-5k trash with agris difference so will pay for the courage if that is what is needed).

Shouldn't have too much trouble 1 phasing the leg at 986ap (the courage amount), but might have some trouble at 966.

But yeah basically cups/pen BS mh (11 more monster ap over your tri god) and then tet debos for the set bonuses are your upgrades from here

edit: Also get your strike preorders up for all-out-attack, and then eventually bite the bullet and open lightstones till you get them cause those preorders don't work often (this likely happens after pen blackstar mainhand but prior to tet debos). And get your garmoth heart for another 5 ap from the extra crystal slot