I know that almost everyone thinks HfH is money grab and we shouldn’t buy it. My opinion is quite different.
I don’t want but i am hoarding to avoid (minimize) wasted 4* and 5* covers. And all kind of my resources growing up (LT, CP, HP) except ISO of course. So once in a while I can spend some HP on 40-pack in Heroic Store or in PVE Vault. This time I can also think about Heroes for Hire Store. But what is better to buy - Heroic 40-pack, PVE Vault 40-pack or multiple HfH (3x3600 and 4x2500 to get comparable cost)?
Heroes for Hire Store
HfH 2500 version
cost: 2500 HP
for: 1 specific 4* cover, 4 Elite Tokens, 4k ISO, 1 CP
HfH 3600 version
cost: 3600 HP
for: 1 specific 4* cover, 8 Elite Tokens, 10k ISO, 3 CP
Heroic 40-pack (propability: 4* 1/14, 3* 1/4)
cost: 11200 HP (daily deal)
for (average): 1 LT (guaranted), 3x 4*, 10x 3*, 27x 2* (and some bonuses)
It can be much worse (or better) of cource.
Vault 40-pack (80 items: 1 LT, 3x 4*, 21x 3*, 55x 2*)
cost: 9800 HP
for (average): 2x 4* (specific but not guaranted), 11x 3*, 27x 2*
And like above it can be much worse (or better).
HfH 3600 x 3
cost: 10800 HP
for: 3x 4* (specific), 24 ET (avg. 6x 3*, 18x 2*), 30k ISO, 9 CP
HfH 2500 x 4
cost: 10000 HP
for: 4x 4* (specific), 16 ET (avg. 4x 3*, 12x 2*), 16k ISO, 4 CP
We can compare Heroic 40-pack with HfH3600 and Vault 40-pack with HfH2500 - cost is almost the same. Below I emphasized differences in both cases.
Heroic 40-pack vs. HfH 3600 (x3)
H40 adv.: 1 LT, 4x 3*, 9x 2*
a chance to get 5*, more chances to get bonus heroes
HfH adv.: 400 HP (cost diff.), 30k ISO, 9 CP
you’ll get three 4* covers that you really wanted, cost spread over time
This is choice between covers and resources (especially LT vs ISO). In this case HfH would be better if you badly need ISO to save dying covers.
Vault 40-pack vs. HfH 2500 (x4)
Vault adv.: 200 HP (cost diff.), 7x 3*, 15x 2*
a chance to get LT and 5*
HfH adv.: 2x 4* (specific), 16k ISO, 4 CP
you’ll get four 4* covers that you really wanted, cost spread over time
Vault pack gives you a lot of covers but two more 4* covers from HfH can be decisive in this choice!
Conclusion
I think HfH is in line with other buying options and really does not deserve that whole hate (I know - unpopular opinion here). Simply you can choice between HfH with guaranted (wanted) 4* and Heroic/Vault with a bunch of 2* and 3*. Additionally HfH gives you one of few moments in this game when you exactly know what you are buying!