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Why choose the Staff of Sar-Iss when you can take a bow without any penalties, and then the mages will, in my opinion, be more effective with their Titans? As for the Elf, I would advise Leadership, reaching the Forest Leader skill and the Speed Aura, and also the hero Wingael, but it's not certain that the mage will take Chaos. If you summon and the Phoenix blocks the archers, plus the Phantoms, it will be very effective, and it's even better to attack with the Elves first, because then the mages will be able to produce mass-produced magic units. That's what it seems like...)))