Recently I started a challenge to play every hero 5 times for multiple reasons but mainly because I mostly play tanks and wanted to try other characters for fun and to see who I would like and just played ragnaros and either I just suck as him (completely possible) or he is just not very good.
A common theme for melee assassins is survivability through either Lifesteal (examples being Kerrigan with assimilation and chrysalis at lvl 13, Malthael’s soul rip and Butcher’s Brand) or abilities that make you harder to kill either through effect or just simply moving you further away from enemies (examples being Illidan’s evasion and sweeping strike, Thrall’s Wind fury and Alarak’s counter strike and telekinesis.)
Ragnaros in comparison doesn’t have great lifesteal through his empower sulfuras 20% damage healed (or 40% if target is a hero) when compared to butcher’s brand which heals for 75% of damage dealt (also doubled if enemy is a hero) which lasts the entire time it would take rag to do another empower. Another example of a better lifesteal is Kerrigan’s assimilation because while less than rag’s healing at 10% damage dealt (20% if target is enemy hero) she has the means to close the gap and it stacks on all abilities.
On the other hand he doesn’t have great movement or evade type abilities because the 25% movement speed boost from blast wave is decent it is 1. not fast enough to get away from “sticky” hero’s like illidan and isn’t enough to counter a lot of other slowing abilities and 2. doesn’t last long enough at 1.5 seconds (can be increased to 3 if you take the lvl 16 talent blast echo). A good example of a slow that counters the speed boost is orphea’s dread which slows for 25% so he is moving at normal speed but dread lasts for half a second longer, another example is kel’thuzad’s frost nova which slows by 35% so he is slowed regardless.
As for increasing survivability there are a couple of options you can take but overall feel a bit lacking in actually making a difference in the outcome of a fight, there is the lvl 4 talents, catching fire which I will say is pretty decent for a regen globe quest or alternatively fire ward which is also decent but since you can only living meteor every 12 seconds in a match of sustain will just rip you apart.
Lvl 13’s talents all increase his survivability but only one is good because Tempered Flame makes it so you lose the option of running if used in an offensive manor and Resilient Flame only activates on stun so if they don’t have a cc heavy team is next to useless. Cauterize Wounds is a good choice but because of the cooldown on empower sulfuras is rarely saving (Hand of ragnaros does counter-act this point slightly but if you are in the meat of 2 or more people they are probably going to just burst you down anyway)
And lastly the lvl 20 talent submerge which its only purpose seems to be avoiding an attack like mephisto’s consume souls or kael’thas pyroblast because the heal isn’t enough to counter act the fact the enemy is positioning themselves better and is not very good in comparison to the other 2 choices you will have at the time.
To finish off I would like to clear up a couple things. When rag was first released I really liked him but small nerfs over time especially to empower sulfuras have made him a worse choice over a lot of other assassins and I will say molten core does have its uses and its quite fun to take over a fort or keep and slam down on enemies but molten core is with its faults first is its damage isn’t great for good reasons because if they were he would be too good especially on braxis and secondly it can negate a push but only because it can kill minions quickly not because it scares off people too bad because over my many molten cores it didn’t really feel like I was doing much but mitigate a slight bit of damage on the fort/keep and kill minions which as rag you can already do pretty well.
I think there are a couple of choices to make him better whether these are good or not is entirely up to you but I would like to know what would be wrong with these if anyone reads this far.
Empower sulfuras heal is 30% (60% on heroes) would increase it just by that little bit that could help him out quite a lot.
Living meteor (or maybe just meteor bomb) and blast wave heal for 20% doubled on heroes.
Lava wave is only visible within sight so the audio is still a que that he has ulted and when it kills minions it comes up for a second just so it isn’t blatantly obvious which lane its going down.
And last idea would be a base increase to health because then he could be classed more as a brawler who in my opinion makes more sense considering who he is and that he does have all those rocks to increase his sturdiness.
Edit: Thanks to all the people who replied giving me some great insight as to how to do better as him and things to keep in mind when playing him.