Tyr is quite comparable to Garjammal.
Both fast, similar stats.
Both heal similarly. One does revive on top while other refreshes regen on spell dmg. Again quite equal though i prefer revive personally.
Fighter class is better than Barbarian one and it enchanes Tyr reviving ability
Last part is dmg, where Garjammal is winner on average .
But Tyr is a alot better solution in many prevalent defenses, where Sif or Isrod do counter attack, or reduce dmg (also Russulla) and Defense uppers ( Krampus, Freya).
Tyr dmges more often than not those at full potential while Garjammal dmg is impaired or he may die to counter attacks…
Then Tyr also has stackable bleeding dot along. You can play Tyr alongside Rokkamush on offense and deal tons of bleeding dmg.
In my personal opinion, i find Tyr better currently