There isnt a huge difference,it is simply their boosts, t2 are 2/3 weaker to t3 only
It can actually be done with 50k t2 very easily the last skimish, albeit 30k-40k t2 if its really quite good at that level (talking lvl 7 possibly 8) maybe talents can put it a little less but you are kinda low to put a bunch of talent points on war rn, this stage is talking t3 with t4
Terrible advice why are you not using your full army? You will have less losses that way.
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