Why not do both unless you’re short on orbs? Both have their uses, and both are worth maxing a second copy of (I did).
If it’s a matter of prioritization, then I’d go with Jackal because then you can use two Jackal+20 on a purple titan and always have that elemental debuff active.
Personally i would go with Griffin. But my reason has more to do with my personal quirk that i do not like using/having duplicate heroes… i know this is not strategic/good gaming, etc… good luck mate!
If I were in your position I’d probably do Griffin first for variety, but I do have two Jackals and a Griffin and tend to use a pair of Jackals in preference to one of each. To be fair, both Jackals have full emblems while Griffin has only a handful at present. But then, if he’s not going to see a lot of use, he’s not going to need a lot of emblems either… How is your emblem situation? Could you max either?
2 jackal is great for titan, crazy high tile damage and if one dies I still have a yellow elementdef down with me. Also for wars I use more often both jackals in 2 different teams with another yellow sniper whereas griffin gets never used in wars.
But, for tournaments griffin is far more used. He is not so squishy as jackal, there I don’t gain much from jackals very fast speed, and he helps against those boril tanks.
So don’t know how high you value tournaments, that would probably be griffins main purpose, at least for me it is…
FWIW I have both at +20, and each has a specific function in my roster.
I use Jackal on my purple titan team, and that’s pretty much it. I haven’t used him in tourneys, events, or wars for a while because he’s a tad squishy.
I use Griffin in wars and tournaments when my opponent has a riposte hero, it’s nice to be able to work away at the riposte hero without taking damage. But I really don’t use him outside of those functions.
It really depends on what you need. Both hit pretty hard, Griffin bypasses while Jackal has really good elemental defense down, so they both have some good skills.
I can also say that I have a dupe of each, and I am in the process of maxing my second Griffin, while I will start on Jackal later. I really don’t think you have a wrong choice here, it just depends on how you play and what your focus is
Riposte heroes don’t bother me that much because I have levelled several dispellers. However it’s nice to have him if I want to use mono holy against Cyprian. But I would rely on tiles for damage so Griffin’s value remains limited.