try a mine layer instatraptrigger fireballer
Goal:
traps trigger before recasted
mine detonate before recasted
example: 30max traps allowed
means you can cast 15traps per click, allowing the first 16 traps to arm
15traps/3clustertrap=5mines per click needed (minefield+minehelm)
requirments: 10 max number of mines allowed, to give the time to arm+detonate
So you can use a Sire of shards-gmp
9balls per trap*15traps per click*4clicks per sec = 540fireballs caster per 1 sec, in a nova