Personally I would level Gormek and Wilbur to 4* 3.60.
4* 3.60 heroes are the most powerful heroes with farmable ascension materials ( see links ).
A 4* 3.60 hero only requires 517 recruits instead of 1034 recruits for a 4* 4.70 hero. So you can level both to 4* 3.60 for the cost of one to 4* 4.70.
Gormek is part of the Ramming Pulverizer trio ( see notes ). Three heroes with one of the most powerful 4* special skills.
Wilbur is getting experienced players very good results ( linky, linky )
Guardian Falcon + Gormek can be very effective on a triple red team versus a Green titan ( see quotes )
Scarlett at 4* 4.70 or 4* 3.60 is very effective on a Wu Kong team ( linky, linky )
Personally I have her at 4* 4.70.
==Notes==
I love the Ramming Pulverizer trio ( Notes RP trio ). Against neutral colors it is nice to pick between a glass cannon ( Grimm ), a shield ( Gormek ) or a jack-of-trades ( Tiburtus ). As you pointed out, against their strong color ( Grimm vs Red, Gormek vs Green, Tiburtus vs Yellow ) it is insane.
But the really nice thing is Grimm + Wu Kong is not as useful versus Green ( Grimm weak + Wu Kong neutral ) & Yellow ( Wu Kong weak + Grimm neutral ) bosses but Gormek + Wu Kong versus Green ( strong + neutral ) and Tiburtus + Wu Kong versus Yellow ( strong + weak ) bosses balances out very nicely. Either just luck, or good design.
Personally I have Boldtusk at 4* 3.60 ( maximum for farmable ascension materials ) mainly because his buff is so short ( Wu Kong outlasts it ) and his heal moderate ( Richard/ Melendor/ Sabina all 42% ). But Boldtusk is great for double strong or double strong & double neutral in war attack or raid attack
==Quotes==
Falcon is VERY effective as part of a doubled or tripled red team. Note that he’s average mana, while Marjana is fast, so you may want to hold her special until Falcon fires his. Really great on titans. Add Gormek to the mix, and you will do some serious damage on green titans
==Links==
==Math==
4* 4.70 = 167,592 XP ( Example yellow 4* 4.70 Wu Kong )
1034 recruits ( extra low cost - RT11 - same color ), 0.517 m food, 63.6 hours of WE
4* 3.60 = 83,871 XP ( Example yellow 4* 4.30 Wu Kong )
517 recruits ( extra low cost - RT11 - same color ), 0.258 m food, 31.94 hours of WE
4 Likes