Overview
Strong Initiator
Strengths
Strong if paired with heroes that throws projectile's abilities
Weaknesses
Weak against heroes that ignore Defense like Lesley for example
Sustain
The key Equipment for item is Thunder Belt, Guardian Helmet and Dominance. Thunder Belt accumulates additional Magic and Physical Defense every time you proc it's passive, this is a good combo with his passive as his Passive is counted as basic attack and Thunder Belt Passive triggers when Marcel triggers Basic Attack. Dominance is a core item as it gives additional defense when you get near to enemies and applies Healing Reduction to near enemies. And of course, Guardian Helmet, this reduces an upcoming attack and heals a percentage of that attack, specially it's passive where you heals HP when away from team fights.
Sustain and Speed Play
Speed, Sustain and Additional damage. The Tenacity emblem is the main core of Marcel's emblem because Marcel needs the increase in Def when low HP as he is a hero that needs to get near to Enemies.
Speed and Aggressive Plays
This emblem set is good for aggressive plays. This apply increase damage buff for teammates when Marcel damage enemies for 3 sec. The Tenacity emblem is the main core of Marcel's emblem because Marcel needs the increase in Def when low HP as he is a hero that needs to get near to Enemies.
Battle Spell
Flicker, combined with Conceal roam passive. This combo is good for surprising enemy.
Level 4 and late game core team fight initiator
Alway look out for enemies and teammates so teammates can easily follows up to Marcel's Ult set. Prioritize using ult on Core damage dealers like Mage and Marksman
Best With Chang'e
Good synergy with Chang'e ult and Marcel Ult. This'll help Chang'e to hit all of his ults projectile.
Watch Out For Lesley
Weak against Lesley as Lesley's damage ignore Defense