witch blitz and support lineups with Sarutobi Hiruzen (Edo Tensei) does the most damage? Combos? Works best vs. who?

you mentioned he will come in various events in the future. What events are considered best/cheapest to get him? On avg. how much coupon/ingot is his price?

i might recharge 10k ingots, but dont think i will recharge a total of 30k ingots just to get him. BUT if his avg. price is 30k one might as well get him now...?