I agree with what @baharoth said; I feel like you put too much emphasis on using the blood rage combo, particularly in conjunction with Rippers. While Ripper Eggs are nice due to celerity, they are much harder to proc off of with Quillbeast on board without using Greater Fortitude(s) first. The combo is powerful on any minions that stick, and the advantages of not using it on a Ripper usually boils down to being able to get off more Quillbeast procs for Bloodrage.
It is also important to note that the Rippers themselves act as an alternate win condition. While Bloodrage can be amazing when pulled off (and a necessity in some matches to win), Hatching a Ripper Egg and using Greater Fortitude on it is still very deadly to use in conjunction with your strong minions (golem package, Thunderhorn, Makantor Warbeast).
Seeing your deck, I would definitely try to get a third Makantor Warbeast due to how strong it is in Magmar as a whole. You run the additional egg package of Insight, Reactor, and Lava lance, of which I haven’t really tested in my version of the deck. Personally, I would cut Rage Reactor at the very least for some AoE (either Thunderhorn or Rebuke), and cut 1 Lava lance for a third Makantor Warbeast.
I think a bit of draw would not hurt the deck, and I can see the utility that Lava lance can provide for the deck. However, I am not sure of A.) How often you will have an egg on board to use these effects and B.) How necessary these effects are in relation to the rest of the deck (without Twin Fang, I did not find myself needing draw as much as I did when running Twin Fang).
In my most recent version of the deck, I have 3 main win conditions; Ripper + Fortitude, Blood Rage, and Twin Fang, of which all 3 have some overlap over each other. I think that you should consider how you plan on winning with the deck, as so far it seems your plan is either through Blood Rage, Rippers, or a combination of both (of which your deck seems heavily geared to accomplish, but which can prove to be difficult in practice. While you have multiple ways to generate eggs, you only have x3 Blood Rages (combo piece) and x3 Quillbeasts (combo activator)).